<snapdata remixID="8982466"><project name="brick wall 2.4" 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="220" y="20" heading="270" 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="94.999999" y="199"><custom-block s="draw brick walls with %n rows"><l>10</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 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