<snapdata remixID="8746505"><project name="U2L4-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="195" y="30" 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="69.80952380952385" y="50.04761904761904"><block s="clear"></block></script><script x="18" y="114"><custom-block s="draw brick, length: %n width: %n"><l>30</l><l>10</l></custom-block></script><script x="308" y="60"><custom-block s="rowA"></custom-block></script><script x="175" y="59"><custom-block s="rowB"></custom-block></script><script x="63" y="206"><custom-block s="draw Brick Wall %s"><l>7</l></custom-block></script><script x="61" y="271"><custom-block s="draw Brick Wall %s"><l>8</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;            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