<snapdata remixID="8927947"><project name="U3L1-brickwall" app="Snap! 5.1, 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" 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="-150" y="-105" 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="372" y="144"><custom-block s="draw brick, length: %n width: %n"><l></l><l></l></custom-block></script><script x="348" y="179"><block s="clear"></block></script><script x="207" y="382"><custom-block s="draw Brick Wall with %s rows"><l>9</l></custom-block></script><script x="411" y="265"><custom-block s="rowB"></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 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s="down"></block><custom-block s="draw brick, length: %n width: %n"><l>11</l><l>10</l></custom-block><block s="up"></block></script></block-definition><block-definition s="draw Brick Wall with %&apos;7&apos; rows" type="command" category="pen"><header></header><code></code><translations></translations><inputs><input type="%s"></input></inputs><script><block s="gotoXY"><l>-150</l><l>120</l></block><block s="doFor"><l>i</l><l>1</l><block var="7"/><script><block s="doIfElse"><block s="reportEquals"><block s="reportModulus"><block var="i"/><l>2</l></block><l>0</l></block><script><custom-block s="rowA"></custom-block><block s="changeYPosition"><l>-25</l></block><block s="setXPosition"><l>-150</l></block></script><script><custom-block s="rowB"></custom-block><block s="setXPosition"><l>-150</l></block><block s="changeYPosition"><l>-25</l></block></script></block></script></block></script></block-definition><block-definition s="rowB 2" type="command" 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