<snapdata remixID="10166808"><project name="U2L4-brickwall" app="Snap! 6, https://snap.berkeley.edu" version="1"><notes></notes><thumbnail>data:image/png;base64,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</thumbnail><stage name="Stage" width="480" height="360" costume="0" color="255,255,255,1" tempo="60" threadsafe="false" penlog="false" volume="100" pan="0" lines="flat" ternary="true" hyperops="true" codify="false" inheritance="false" sublistIDs="false" scheduled="false" id="1"><pentrails>data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAeAAAAFoCAYAAACPNyggAAAYMklEQVR4Xu3cwc3ryBGF0Zk0HI/zmVicj+OZNDwLbS3hErgtVonnrQv9k6eb/LgQ3p9/+EeAAAECBAh8XeDPr/9Ff5AAAQIECBD4Q4AdAgIECBAgcIOAAN+A7k8SIECAAAEBdgYIECBAgMANAgJ8A7o/SYAAAQIEBNgZIECAAAECNwgI8A3o/iQBAgQIEBBgZ4AAAQIECNwgIMA3oPuTBAgQIEBAgJ0BAgQIECBwg4AA34DuTxIgQIAAAQF2BggQIECAwA0CAnwDuj9JgAABAgQE2BkgQIAAAQI3CAjwDej+JIHTAv/517//d+Vv/PX3f//vu+DqOlf+5qdZ1/NZks93fN45t865ALckrUNgkMDVcHqhf+eF3joi9us7+yXArRNrHQIPEhDg7mYL3neC19q11n4JcGtHrEPgQQIC3N3s1gu9dVWu5zsfBALcOrHWIfAgAQHubrbgfSd4rV1r7ZcAt3bEOgQeJCDA3c1uvdBbV+V6vvNBIMCtE2sdAg8SEODuZgved4LX2rXWfglwa0esQ+BBAgLc3ezWC711Va7nOx8EAtw6sdYh8CABAe5utuB9J3itXWvtlwC3dsQ6BB4kIMDdzW690FtX5Xq+80EgwK0Tax0CBAgQIDBIwP+ENWgzXAoBAgQIPEdAgJ+z1+6UAAECBAYJCPCgzXApBAgQIPAcAQF+zl67UwIECBAYJCDAgzbDpRBoCVz9FXTr7/p17mdJPr/h03peBLglaR0CgwQE+LUZgvcbwZt2nluPugC3JK1DYJDAtBeW6/FBkDweWz6YkntJZgQ4UTJDYJmA4AlecmS3BG/aeU5skxkBTpTMEFgmMO2F5Xp8ECSP0JYPguRekhkBTpTMEFgmIHiClxzZLcGbdp4T22RGgBMlMwSWCUx7YbkeHwTJI7TlgyC5l2RGgBMlMwSWCQie4CVHdkvwpp3nxDaZEeBEyQyBZQLTXliuxwdB8ght+SBI7iWZEeBEyQyBZQKCJ3jJkd0SvGnnObFNZgQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcgQkCV3816tewn3eNzzN93u176xkX4JakdQgMEhDg7mYIsAB3T9RrNQE+oWpNAjcLCHB3AwRYgLsnSoBPeFqTwAgBAe5ugwALcPdECfAJT2sSGCEgwN1tEGAB7p4oAT7haU0CIwQEuLsNAizA3RMlwCc8rUlghIAAd7dBgAW4e6IE+ISnNQmMEBDg7jYIsAB3T5QAn/C0JoERAgLc3QYBFuDuiRLgE57WJDBCQIC72yDAAtw9UQJ8wtOaBAgQIEAgEvAfcURMhggQIECAQFdAgLueViNAgAABApGAAEdMhggQIECAQFdAgLueViNAgAABApGAAEdMhgjsErj6K+jW3fm18GdJPr/h03peBLglaR0CgwQE+LUZgvcbwZt2nluPugC3JK1DYJDAtBeW6/FBkDweWz6YkntJZgQ4UTJDYJmA4AlecmS3BG/aeU5skxkBTpTMEFgmMO2F5Xp8ECSP0JYPguRekhkBTpTMEFgmIHiClxzZLcGbdp4T22RGgBMlMwSWCUx7YbkeHwTJI7TlgyC5l2RGgBMlMwSWCQie4CVHdkvwpp3nxDaZEeBEyQyBZQLTXliuxwdB8ght+SBI7iWZEeBEyQyBZQKCJ3jJkd0SvGnnObFNZgQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcgQkCV3816tewn3eNzzN93u176xkX4JakdQgMEhDg7mYIsAB3T9RrNQE+oWpNAjcLCHB3AwRYgLsnSoBPeFqTwAgBAe5ugwALcPdECfAJT2sSGCEgwN1tEGAB7p4oAT7haU0CIwQEuLsNAizA3RMlwCc8rUlghIAAd7dBgAW4e6IE+ISnNQmMEBDg7jYIsAB3T5QAn/C0JoERAgLc3QYBFuDuiRLgE57WJDBCQIC72yDAAtw9UQJ8wtOaBAgQIEAgEvAfcURMhggQIECAQFdAgLueViNAgAABApGAAEdMhggQIECAQFdAgLueViNAgAABApGAAEdMhgjsErj6K+jW3fm18GdJPr/h03peBLglaR0CgwQE+LUZgvcbwZt2nluPugC3JK1DYJDAtBeW6/FBkDweWz6YkntJZgQ4UTJDYJmA4AlecmS3BG/aeU5skxkBTpTMEFgmMO2F5Xp8ECSP0JYPguRekhkBTpTMEFgmIHiClxzZLcGbdp4T22RGgBMlMwSWCUx7YbkeHwTJI7TlgyC5l2RGgBMlMwSWCQie4CVHdkvwpp3nxDaZEeBEyQyBZQLTXliuxwdB8ght+SBI7iWZEeBEyQyBZQKCJ3jJkd0SvGnnObFNZgQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcgQkCV3816tewn3eNzzN93u176xkX4JakdQgMEhDg7mYIsAB3T9RrNQE+oWpNAjcLCHB3AwRYgLsnSoBPeFqTwAgBAe5ugwALcPdECfAJT2sSGCEgwN1tEGAB7p4oAT7haU0CIwQEuLsNAizA3RMlwCc8rUlghIAAd7dBgAW4e6IE+ISnNQmMEBDg7jYIsAB3T5QAn/C0JoERAgLc3QYBFuDuiRLgE57WJDBCQIC72yDAAtw9UQJ8wtOaBAgQIEAgEvAfcURMhggQIECAQFdAgLueViNAgAABApGAAEdMhggQIECAQFdAgLueViNAgAABApGAAEdMhgjsErj6K+jW3fm18GdJPr/h03peBLglaR0CgwQE+LUZgvcbwZt2nluPugC3JK1DYJDAtBeW6/FBkDweWz6YkntJZgQ4UTJDYJmA4AlecmS3BG/aeU5skxkBTpTMEFgmMO2F5Xp8ECSP0JYPguRekhkBTpTMEFgmIHiClxzZLcGbdp4T22RGgBMlMwSWCUx7YbkeHwTJI7TlgyC5l2RGgBMlMwSWCQie4CVHdkvwpp3nxDaZEeBEyQyBZQLTXliuxwdB8ght+SBI7iWZEeBEyQyBZQKCJ3jJkd0SvGnnObFNZgQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcgQkCV3816tewn3eNzzN93u176xkX4JakdQgMEhDg7mYIsAB3T9RrNQE+oWpNAjcLCHB3AwRYgLsnSoBPeFqTwAgBAe5ugwALcPdECfAJT2sSGCEgwN1tEGAB7p4oAT7haU0CIwQEuLsNAizA3RMlwCc8rUlghIAAd7dBgAW4e6IE+ISnNQmMEBDg7jYIsAB3T5QAn/C0JoERAgLc3QYBFuDuiRLgE57WJDBCQIC72yDAAtw9UQJ8wtOaBAgQIEAgEvAfcURMhggQIECAQFdAgLueViNAgAABApGAAEdMhggQIECAQFdAgLueViNAgAABApGAAEdMhgjsErj6K+jW3fm18GdJPr/h03peBLglaR0CgwQE+LUZgvcbwZt2nluPugC3JK1DYJDAtBeW6/FBkDweWz6YkntJZgQ4UTJDYJmA4AlecmS3BG/aeU5skxkBTpTMEFgmMO2F5Xp8ECSP0JYPguRekhkBTpTMEFgmIHiClxzZLcGbdp4T22RGgBMlMwSWCUx7YbkeHwTJI7TlgyC5l2RGgBMlMwSWCQie4CVHdkvwpp3nxDaZEeBEyQyBZQLTXliuxwdB8ght+SBI7iWZEeBEyQyBZQKCJ3jJkd0SvGnnObFNZgQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcgQkCV3816tewn3eNzzN93u176xkX4JakdQgMEhDg7mYIsAB3T9RrNQE+oWpNAjcLCHB3AwRYgLsnSoBPeFqTwAgBAe5ugwALcPdECfAJT2sSGCEgwN1tEGAB7p4oAT7haU0CIwQEuLsNAizA3RMlwCc8rUlghIAAd7dBgAW4e6IE+ISnNQmMEBDg7jYIsAB3T5QAn/C0JoERAgLc3QYBFuDuiRLgE57WJDBCQIC72yDAAtw9UQJ8wtOaBAgQIEAgEvAfcURMhggQIECAQFdAgLueViNAgAABApGAAEdMhggQIECAQFdAgLueViNAgAABApGAAEdMhgjsErj6K+jW3fm18GdJPr/h03peBLglaR0CgwQE+LUZgvcbwZt2nluPugC3JK1DYJDAtBeW6/FBkDweWz6YkntJZgQ4UTJDYJmA4AlecmS3BG/aeU5skxkBTpTMEFgmMO2F5Xp8ECSP0JYPguRekhkBTpTMEFgmIHiClxzZLcGbdp4T22RGgBMlMwSWCUx7YbkeHwTJI7TlgyC5l2RGgBMlMwSWCQie4CVHdkvwpp3nxDaZEeBEyQyBZQLTXliuxwdB8ght+SBI7iWZEeBEyQyBZQKCJ3jJkd0SvGnnObFNZgQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcgQkCV3816tewn3eNzzN93u176xkX4JakdQgMEhDg7mYIsAB3T9RrNQE+oWpNAjcLCHB3AwRYgLsnSoBPeFqTwAgBAe5ugwALcPdECfAJT2sSGCEgwN1tEGAB7p4oAT7haU0CIwQEuLsNAizA3RMlwCc8rUlghIAAd7dBgAW4e6IE+ISnNQmMEBDg7jYIsAB3T5QAn/C0JoERAgLc3QYBFuDuiRLgE57WJDBCQIC72yDAAtw9UQJ8wtOaBAgQIEAgEvAfcURMhggQIECAQFdAgLueViNAgAABApGAAEdMhggQIECAQFdAgLueViNAgAABApGAAEdMhgjsErj6K+jW3fm18GdJPr/h03peBLglaR0CgwQE+LUZgvcbwZt2nluPugC3JK1DYJDAtBeW6/FBkDweWz6YkntJZgQ4UTJDYJmA4AlecmS3BG/aeU5skxkBTpTMEFgmMO2F5Xp8ECSP0JYPguRekhkBTpTMEFgmIHiClxzZLcGbdp4T22RGgBMlMwSWCUx7YbkeHwTJI7TlgyC5l2RGgBMlMwSWCQie4CVHdkvwpp3nxDaZEeBEyQyBZQLTXliuxwdB8ght+SBI7iWZEeBEyQyBZQKCJ3jJkd0SvGnnObFNZgQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcgQkCV3816tewn3eNzzN93u176xkX4JakdQgMEhDg7mYIsAB3T9RrNQE+oWpNAjcLCHB3AwRYgLsnSoBPeFqTwAgBAe5ugwALcPdECfAJT2sSGCEgwN1tEGAB7p4oAT7haU0CIwQEuLsNAizA3RMlwCc8rUlghIAAd7dBgAW4e6IE+ISnNQmMEBDg7jYIsAB3T5QAn/C0JoERAgLc3QYBFuDuiRLgE57WJDBCQIC72yDAAtw9UQJ8wtOaBAgQIEAgEvAfcURMhggQIECAQFdAgLueViNAgAABApGAAEdMhggQIECAQFdAgLueViNAgAABApGAAEdMhgjsErj6K+jW3fm18GdJPr/h03peBLglaR0CgwQE+LUZgvcbwZt2nluPugC3JK1DYJDAtBeW6/FBkDweWz6YkntJZgQ4UTJDYJmA4AlecmS3BG/aeU5skxkBTpTMEFgmMO2F5Xp8ECSP0JYPguRekhkBTpTMEFgmIHiClxzZLcGbdp4T22RGgBMlMwSWCUx7YbkeHwTJI7TlgyC5l2RGgBMlMwSWCQie4CVHdkvwpp3nxDaZEeBEyQyBZQLTXliuxwdB8ght+SBI7iWZEeBEyQyBZQKCJ3jJkd0SvGnnObFNZgQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcgQkCV3816tewn3eNzzN93u176xkX4JakdQgMEhDg7mYIsAB3T9RrNQE+oWpNAjcLCHB3AwRYgLsnSoBPeFqTwAgBAe5ugwALcPdECfAJT2sSGCEgwN1tEGAB7p4oAT7haU0CIwQEuLsNAizA3RMlwCc8rUlghIAAd7dBgAW4e6IE+ISnNQmMEBDg7jYIsAB3T5QAn/C0JoERAgLc3QYBFuDuiRLgE57WJDBCQIC72yDAAtw9UQJ8wtOaBAgQIEAgEvAfcURMhggQIECAQFdAgLueViNAgAABApGAAEdMhggQIECAQFdAgLueViNAgAABApGAAEdMhgjsErj6K+jW3fm18GdJPr/h03peBLglaR0CgwQE+LUZgvcbwZt2nluPugC3JK1DYJDAtBeW6/FBkDweWz6YkntJZgQ4UTJDYJmA4AlecmS3BG/aeU5skxkBTpTMEFgmMO2F5Xp8ECSP0JYPguRekhkBTpTMEFgmIHiClxzZLcGbdp4T22RGgBMlMwSWCUx7YbkeHwTJI7TlgyC5l2RGgBMlMwSWCQie4CVHdkvwpp3nxDaZEeBEyQyBZQLTXliuxwdB8ght+SBI7iWZEeBEyQyBZQKCJ3jJkd0SvGnnObFNZgQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcgQkCV3816tewn3eNzzN93u176xkX4JakdQgMEhDg7mYIsAB3T9RrNQE+oWpNAjcLCHB3AwRYgLsnSoBPeFqTwAgBAe5ugwALcPdECfAJT2sSGCEgwN1tEGAB7p4oAT7haU0CIwQEuLsNAizA3RMlwCc8rUlghIAAd7dBgAW4e6IE+ISnNQmMEBDg7jYIsAB3T5QAn/C0JoERAgLc3QYBFuDuiRLgE57WJDBCQIC72yDAAtw9UQJ8wtOaBAgQIEAgEvAfcURMhggQIECAQFdAgLueViNAgAABApGAAEdMhggQIECAQFdAgLueViNAgAABApGAAEdMhgjsErj6K+jW3fm18GdJPr/h03peBLglaR0CgwQE+LUZgvcbwZt2nluPugC3JK1DYJDAtBeW6/FBkDweWz6YkntJZgQ4UTJDYJmA4AlecmS3BG/aeU5skxkBTpTMEFgmMO2F5Xp8ECSP0JYPguRekhkBTpTMEFgmIHiClxzZLcGbdp4T22RGgBMlMwSWCUx7YbkeHwTJI7TlgyC5l2RGgBMlMwSWCQie4CVHdkvwpp3nxDaZEeBEyQyBZQLTXliuxwdB8ght+SBI7iWZEeBEyQyBZQKCJ3jJkd0SvGnnObFNZgQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBAQ4UTJDgAABAgTKAgJcBrUcAQIECBBIBP4BOCRSlT29v8MAAAAASUVORK5CYII=</pentrails><costumes><list struct="atomic" id="2"></list></costumes><sounds><list struct="atomic" id="3"></list></sounds><variables></variables><blocks></blocks><scripts></scripts><sprites><sprite name="Sprite" idx="1" x="0" y="-140" heading="90" scale="1" volume="100" pan="0" rotation="1" draggable="true" costume="0" color="145,26,68,1" pen="tip" id="8"><costumes><list struct="atomic" id="9"></list></costumes><sounds><list struct="atomic" id="10"></list></sounds><blocks></blocks><variables></variables><scripts><script x="15" y="10"><block s="gotoXY"><l>0</l><l>160</l></block><block s="clear"></block></script><script x="10" y="89.49999999999991"><custom-block s="draw brick wall with %n rows"><l>20</l></custom-block></script><script x="19" y="192.83333333333317"><custom-block s="rowA"></custom-block></script><script x="81" y="193.66666666666654"><custom-block s="rowB"></custom-block></script><script x="10" y="251.49999999999991"><custom-block s="even? %n"><l></l></custom-block></script></scripts></sprite></sprites></stage><hidden></hidden><headers></headers><code></code><blocks><block-definition s="set flag %&apos;which&apos; to %&apos;tf&apos;" type="command" category="sensing"><header></header><code></code><translations></translations><inputs><input type="%s" readonly="true"><options>Presentation mode&#xD;Retina display support&#xD;Long form input dialog&#xD;Plain prototype labels&#xD;Input sliders&#xD;Execute on slider change&#xD;Clicking sound&#xD;Turbo mode&#xD;Flat design&#xD;Keyboard editing&#xD;Table support&#xD;Table lines&#xD;Visible stepping&#xD;Thread safe scripts&#xD;Prefer smooth animations&#xD;Flat line ends&#xD;Codification support&#xD;Inheritance support</options></input><input type="%b"></input></inputs><script><block s="doRun"><block s="reportJSFunction"><list><l>which</l><l>tf</l></list><l>var   stage = this.parentThatIsA(StageMorph),&#xD;        ide = stage.parentThatIsA(IDE_Morph),&#xD;        world = stage.parentThatIsA(WorldMorph);&#xD;&#xD;if (tf != !!tf) return;&#xD;&#xD;try{&#xD;ide.savingPreferences = false;&#xD;&#xD;switch (which) {&#xD;    case &apos;Presentation mode&apos;:&#xD;        if (tf != ide.isAppMode) ide.toggleAppMode();&#xD;        break;&#xD;    case &apos;Retina display support&apos;:&#xD;        if (tf != isRetinaEnabled()) ide.toggleRetina();&#xD;        break;&#xD;    case &apos;Long form input dialog&apos;:&#xD;        if (tf != InputSlotDialogMorph.prototype.isLaunchingExpanded)&#xD;            ide.toggleLongFormInputDialog();&#xD;        break;&#xD;    case &apos;Plain prototype labels&apos;:&#xD;        if (tf != BlockLabelPlaceHolderMorph.prototype.plainLabel)&#xD;            ide.togglePlainPrototypeLabels();&#xD;        break;&#xD;    case &apos;Input sliders&apos;:&#xD;        MorphicPreferences.useSliderForInput = tf;&#xD;        break;&#xD;    case &apos;Execute on slider change&apos;:&#xD;        ArgMorph.prototype.executeOnSliderEdit = tf;&#xD;        break;&#xD;    case &apos;Clicking sound&apos;:&#xD;        if (tf != !!BlockMorph.prototype.snapSound)&#xD;            BlockMorph.prototype.toggleSnapSound();&#xD;        break;&#xD;    case &apos;Turbo mode&apos;:&#xD;        if (tf != stage.isFastTracked)&#xD;            ide.toggleFastTracking();&#xD;        break;&#xD;    case &apos;Flat design&apos;:&#xD;        if (tf == MorphicPreferences.isFlat) break;&#xD;        if (tf)&#xD;            ide.flatDesign();&#xD;        else&#xD;            ide.defaultDesign();&#xD;        break;&#xD;    case &apos;Keyboard editing&apos;:&#xD;            ScriptsMorph.prototype.enableKeyboard = tf;&#xD;        break;&#xD;    case &apos;Table support&apos;:&#xD;            List.prototype.enableTables = tf;&#xD;        break;&#xD;    case &apos;Table lines&apos;:&#xD;                TableMorph.prototype.highContrast = tf;&#xD;        break;&#xD;    case &apos;Visible stepping&apos;:&#xD;        if (tf != Process.prototype.enableSingleStepping)&#xD;            ide.toggleSingleStepping();&#xD;        break;&#xD;    case &apos;Thread safe scripts&apos;:&#xD;        stage.isThreadSafe = tf;&#xD;        break;&#xD;    case &apos;Prefer smooth animations&apos;:&#xD;        if (tf != (StageMorph.prototype.frameRate &gt; 0))&#xD;            ide.toggleVariableFrameRate();&#xD;        break;&#xD;    case &apos;Flat line ends&apos;:&#xD;        SpriteMorph.prototype.useFlatLineEnds = tf;&#xD;        break;&#xD;    case &apos;Codification support&apos;:&#xD;        if (tf != StageMorph.prototype.enableCodeMapping) {&#xD;            StageMorph.prototype.enableCodeMapping = tf;&#xD;            ide.currentSprite.blocksCache.variables = null;&#xD;            ide.currentSprite.paletteCache.variables = null;&#xD;            ide.refreshPalette();&#xD;        }&#xD;        break;&#xD;    case &apos;Inheritance support&apos;:&#xD;        if (tf != StageMorph.prototype.enableInheritance) {&#xD;            StageMorph.prototype.enableInheritance = tf;&#xD;            ide.currentSprite.blocksCache.variables = null;&#xD;            ide.currentSprite.paletteCache.variables = null;&#xD;            ide.refreshPalette();&#xD;        }&#xD;        break;&#xD;};&#xD;}&#xD;finally {&#xD;ide.savingPreferences = false;&#xD;};&#xD;</l></block><list><block var="which"/><block var="tf"/></list></block></script></block-definition><block-definition s="draw brick, length: %&apos;length&apos; width: %&apos;width&apos;" type="command" category="pen"><header></header><code></code><translations></translations><inputs><input type="%n"></input><input type="%n"></input></inputs><script><block s="setColor"><color>145,26,68,1</color></block><custom-block s="set flat line ends to %b"><block s="reportBoolean"><l><bool>true</bool></l></block></custom-block><block s="setSize"><block var="width"/></block><block s="down"></block><block s="forward"><block var="length"/></block><block s="up"></block></script></block-definition><block-definition s="set flat line ends to %&apos;flag&apos;" type="command" category="pen"><header></header><code></code><translations></translations><inputs><input type="%b"></input></inputs><script><custom-block s="set flag %s to %b"><l>Flat line ends</l><block var="flag"/></custom-block></script></block-definition><block-definition s="rowA" type="command" category="pen"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doRepeat"><l>6</l><script><custom-block s="draw brick, length: %n width: %n"><l>30</l><l>10</l></custom-block><block s="forward"><l>6</l></block></script></block></script></block-definition><block-definition s="rowB" type="command" category="pen"><header></header><code></code><translations></translations><inputs></inputs><script><block s="forward"><l>6</l></block><custom-block s="draw brick, length: %n width: %n"><l>12</l><l>10</l></custom-block><block s="forward"><l>6</l></block><block s="doRepeat"><l>5</l><script><custom-block s="draw brick, length: %n width: %n"><l>30</l><l>10</l></custom-block><block s="forward"><l>6</l></block></script></block><custom-block s="draw brick, length: %n width: %n"><l>12</l><l>10</l></custom-block></script></block-definition><block-definition s="even? %&apos;number&apos;" type="predicate" category="operators"><header></header><code></code><translations></translations><inputs><input type="%n"></input></inputs><script><block s="doReport"><block s="reportEquals"><block s="reportModulus"><block var="number"/><l>2</l></block><l>0</l></block></block></script></block-definition><block-definition s="draw brick wall with %&apos;rows&apos; rows" type="command" category="pen"><header></header><code></code><translations></translations><inputs><input type="%n"></input></inputs><script><block s="doFor"><l>i</l><l>1</l><l>10</l><script><block s="doIfElse"><custom-block s="even? %n"><block var="i"/></custom-block><script><custom-block s="rowA"></custom-block><block s="turnLeft"><l>180</l></block><block s="changeYPosition"><l>-15</l></block></script><script><custom-block s="rowB"></custom-block><block s="turnLeft"><l>180</l></block><block s="changeYPosition"><l>-15</l></block></script></block></script></block></script></block-definition></blocks><variables></variables></project><media name="U2L4-brickwall" app="Snap! 6, https://snap.berkeley.edu" version="1"></media></snapdata>