<snapdata remixID="9121767"><project name="U2L12-brickwall - starter" app="Snap! 5.4, http://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" codify="false" inheritance="false" sublistIDs="false" scheduled="false" id="1"><pentrails>data:image/png;base64,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</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="-200" y="-107" 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="27" y="261.6666676666667"><block s="gotoXY"><l>-50</l><l>-10</l></block><custom-block s="draw brick, length: %n width: %n"><l>10</l><l>10</l></custom-block><block s="up"></block><block s="forward"><l>10</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="up"></block><block s="forward"><l>10</l></block></script></block><custom-block s="draw brick, length: %n width: %n"><l>10</l><l>10</l></custom-block><block s="up"></block><block s="forward"><l>10</l></block></script><script x="318.999999" y="305"><block s="gotoXY"><l>-50</l><l>0</l></block><block s="doRepeat"><l>6</l><script><block s="down"></block><custom-block s="draw brick, length: %n width: %n"><l>30</l><l>10</l></custom-block><block s="up"></block><block s="forward"><l>10</l></block></script></block></script><script x="42" y="71.66666766666663"><block s="gotoXY"><l>-200</l><l>100</l></block><block s="clear"></block><custom-block s="draw Brick Wall with %s rows with Bricks per Row: %s of brick Length: %s Width: %s Gap thickness: %s"><l>9</l><l>8</l><l>35</l><l>20</l><l>3</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 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