<snapdata remixID="9221562"><project name="M6L4A2 - BRICK WALL" 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="-50" 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="349" y="52"><block s="clear"></block><block s="gotoXY"><l>0</l><l>0</l></block></script><script x="32.000001" y="117.80000100000001"><block s="setHeading"><l>90</l></block><custom-block s="rowA with bricks per row %s length %s width %s gap %s"><block var="bricks"/><block var="length"/><block var="width"/><block var="gap"/></custom-block><block s="setXPosition"><l>-200</l></block><block s="changeYPosition"><l>-15</l></block><custom-block s="rowB with bricks per row %s length %s width %s gap %s"><block var="bricks"/><block var="length"/><block var="width"/><block var="gap"/></custom-block><block s="setXPosition"><l>-200</l></block><block s="changeYPosition"><l>-15</l></block></script><script x="11.000000999999997" y="41"><custom-block s="rowA with bricks per row %s length %s width %s gap %s"><l>5</l><l>20</l><l>10</l><l>5</l></custom-block></script><script x="30.000000999999997" y="10"><custom-block s="rowB with bricks per row %s length %s width %s gap %s"><l>5</l><l>20</l><l>10</l><l>5</l></custom-block></script><script x="65.000002" y="408.80000199999995"><custom-block s="rowA with bricks per row %s length %s width %s gap %s"><l>5</l><l>30</l><l>10</l><l>5</l></custom-block><block s="turnLeft"><l>180</l></block><block s="changeYPosition"><l>-15</l></block><custom-block s="rowB with bricks per row %s length %s width %s gap %s"><l>5</l><l>30</l><l>10</l><l>6</l></custom-block><block s="turnLeft"><l>180</l></block><block s="changeYPosition"><l>-15</l></block></script><script x="37" y="310.9999999999999"><custom-block s="draw Brick Wall with %n rows with bricks per row %s of brick length %s width %s gap thickness %s"><l>10</l><l>5</l><l>30</l><l>10</l><l>5</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; 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