<snapdata remixID="8927493"><project name="U2L4-checkerboard_SV" 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><sprite name="Sprite" idx="1" x="-140" y="210" heading="90" scale="1" volume="100" pan="0" rotation="1" draggable="true" costume="0" color="8,5,0,1" 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="111" y="168"><custom-block s="draw a checkerboard with %s rows"><l>8</l></custom-block></script><script x="54" y="47"><block s="clear"></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;        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