<snapdata remixID="9212823"><project name="M6L4-brickwall_starter" app="Snap! 5.4, 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" penlog="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="-200" y="-100" 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="10" y="56.33333333333334"><custom-block s="draw brick, length: %n width: %n"><l>30</l><l>10</l></custom-block></script><script x="68" y="114"><custom-block s="row a"></custom-block></script><script x="69" y="156"><custom-block s="row b"></custom-block></script><script x="250" y="100"><block s="receiveGo"></block><block s="clear"></block><custom-block s="brick wall rows: %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;            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 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