<snapdata remixID="9265471"><project name="U2L4-brickwall" 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="-100" y="-80" 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="39" y="34"><block s="receiveGo"></block><block s="gotoXY"><l>-100</l><l>100</l></block><block s="clear"></block><custom-block s="draw Brick Wall"></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 s="up"></block></script></block-definition><block-definition s="set flat line ends to %&apos;flag&apos;" type="command" category="pen"><header></header><code></code><translations></translations><inputs><input type="%b"></input></inputs><script><custom-block s="set flag %s to %b"><l>Flat line ends</l><block var="flag"/></custom-block></script></block-definition><block-definition s="Row #1" type="command" category="pen"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doRepeat"><l>6</l><script><custom-block s="draw brick, length: %n width: %n"><l>30</l><l>10</l></custom-block><block s="forward"><l>6</l></block></script></block></script></block-definition><block-definition s="Row #2" type="command" category="pen"><header></header><code></code><translations></translations><inputs></inputs><script><block s="forward"><l>6</l></block><custom-block s="draw brick, length: %n width: %n"><l>12</l><l>10</l></custom-block><block s="forward"><l>6</l></block><block s="doRepeat"><l>5</l><script><custom-block s="draw brick, length: %n width: %n"><l>30</l><l>10</l></custom-block><block s="forward"><l>6</l></block></script></block><custom-block s="draw brick, length: %n width: %n"><l>12</l><l>10</l></custom-block></script></block-definition><block-definition s="Make Wall" type="command" category="motion"><header></header><code></code><translations></translations><inputs></inputs></block-definition><block-definition s="draw Brick Wall" type="command" category="motion"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doRepeat"><l>6</l><script><custom-block s="Row #1"></custom-block><block s="turnLeft"><l>180</l></block><block s="changeYPosition"><l>-15</l></block><custom-block s="Row #2"></custom-block><block s="turnLeft"><l>180</l></block><block s="changeYPosition"><l>-15</l></block></script></block></script></block-definition></blocks><variables></variables></project><media name="U2L4-brickwall" app="Snap! 5.4, http://snap.berkeley.edu" version="1"></media></snapdata>