<snapdata remixID="8709503"><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 id="2"><item><costume name="Untitled" center-x="240" center-y="180" 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y="35.49999900000003"><block s="doWarp"><script></script></block></script><script x="445.33333433333337" y="36"><block s="clear"></block></script><script x="383.33333433333337" y="208"><custom-block s="draw brick, length: %n width: %n"><l>28</l><l>8</l></custom-block></script><script x="352.33333433333337" y="317"><custom-block s="second row %n"><l>10</l></custom-block></script><script x="180.33333433333337" y="29"><block s="turn"><l>90</l></block></script><script x="438" y="465"><custom-block s="draw brick wall : Length: %s Width: %s"><l>10</l><l>10</l></custom-block></script><script x="316.33333433333337" y="388"><custom-block s="start row %n"><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 = 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