<snapdata remixID="8965972"><project name="U3L1-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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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="0" y="400" 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="115.9090909090909" y="183.18181818181816"><custom-block s="draw a brick wall with %s rows"><l>40</l></custom-block></script><script x="192.45454645454544" y="356.5454555454545"><block s="doIfElse"><l/><script></script><script></script></block></script><script x="99.09090909090908" y="297.7272727272727"><block s="doFor"><l>i</l><l>1</l><block var="num"/><script></script></block></script></scripts></sprite><watcher var="rows" style="normal" x="10" y="10" color="243,118,29" hidden="true"/></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;            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