<snapdata remixID="8928394"><project name="U2L4: page 3-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><watcher var="row number" style="normal" x="10" y="10" color="243,118,29"/><sprite name="Sprite" idx="1" x="-156" y="-31" heading="90" scale="1" volume="100" pan="0" rotation="1" draggable="true" costume="0" color="145,26,68,1" pen="tip" id="9"><costumes><list struct="atomic" id="10"></list></costumes><sounds><list struct="atomic" id="11"></list></sounds><blocks></blocks><variables></variables><scripts><script x="97" y="335"><custom-block s="even? %n"><l>12</l></custom-block></script><script x="51" y="35"><block s="gotoXY"><l>0</l><l>0</l></block><block s="clear"></block></script><script x="77" y="97"><custom-block s="rowA"></custom-block><block s="turnLeft"><l>180</l></block><block s="changeYPosition"><l>-15</l></block><custom-block s="rowB"></custom-block><block s="turnLeft"><l>180</l></block><block s="changeYPosition"><l>-15</l></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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