<snapdata remixID="9085702"><project name="U2L4-brickwall 2" 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="-100" y="95" 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="337" y="42.666666666666686"><block s="clear"></block></script><script x="31" y="10"><custom-block s="draw brick, length: %n width: %n"><l>30</l><l>10</l></custom-block></script><script x="335" y="176.66666666666669"><custom-block s="draw brick wall with %n rows"><l>13</l></custom-block></script><script x="441.000002" y="270.46666866666664"><block s="changeYPosition"><l>-15</l></block><custom-block s="rowA"></custom-block></script><script x="10" y="180.46666666666653"><block s="doIf"><block s="reportLessThan"><l>1</l><block var="rows"/></block><script><block s="gotoXY"><l>-200</l><l>100</l></block><block s="doRepeat"><l>1</l><script><block s="setXPosition"><l>-200</l></block><custom-block s="rowA"></custom-block><block s="changeYPosition"><l>-15</l></block><custom-block s="rowB"></custom-block></script></block></script></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 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