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id="10"/></item><item><costume name="sick" center-x="12" center-y="26" image="data:image/png;base64,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" id="11"/></item></list></costumes><sounds><list struct="atomic" id="12"></list></sounds><blocks></blocks><variables><variable name="infected?"><bool>false</bool></variable></variables><scripts><script x="28" y="10"><custom-block s="simulate disease, population: %n percent infected: %n speed: %n"><l>50</l><l>5</l><l>2</l></custom-block></script><script x="30" y="44.6666666666667"><block s="receiveOnClone"></block><custom-block s="initialize clone"></custom-block><block s="doWaitUntil"><block var="running"/></block><block s="doUntil"><block s="reportEquals"><block var="number infected"/><block var="population"/></block><script><block s="forward"><block var="speed"/></block><block s="bounceOffEdge"></block><block s="doWarp"><script><block s="doIf"><custom-block s="touching infected person?"></custom-block><script><block s="doIf"><block s="reportNot"><block var="infected?"/></block><script><block s="doChangeVar"><l>number infected</l><l>1</l></block></script></block><block s="doSetVar"><l>infected?</l><block s="reportBoolean"><l><bool>true</bool></l></block></block><block s="doSwitchToCostume"><l>sick</l></block></script></block></script></block></script></block></script><script x="31" y="362.9999999999999"><block s="receiveMessage"><l>vanish</l></block><block s="removeClone"></block></script><script x="34.33333333333334" y="430.9999999999998"><block s="receiveGo"></block><block s="bubble"><l></l></block><block s="bubble"><custom-block s="simulate disease, population: %n percent infected: %n speed: %n"><l>100</l><l>5</l><l>2</l></custom-block></block><block s="show"></block></script><script x="38.714285714285694" y="600.4489795918369"><custom-block s="average time for disease spread with population size: %n"><l>200</l></custom-block></script><script x="469.6416015625" y="400.3605442176871"><block s="reportTouchingObject"><l></l></block></script></scripts></sprite><watcher scope="Sprite" var="infected?" style="normal" x="9.999999999999545" y="10.000000000000007" color="243,118,29" hidden="true"/><watcher var="number infected" style="normal" x="9.999999999999545" y="40.000001999999995" color="243,118,29" hidden="true"/><watcher var="running" style="normal" x="9.999999999999545" y="160.00000999999995" color="243,118,29" hidden="true"/><watcher var="start time" style="normal" x="9.999999999999545" y="190.00001199999994" color="243,118,29" hidden="true"/><watcher var="elapsed time" style="normal" x="9.999999999999545" y="220.00001400000002" color="243,118,29" hidden="true"/></sprites></stage><hidden></hidden><headers></headers><code></code><blocks><block-definition s="simulate disease, population: %&apos;population&apos; percent infected: %&apos;percent initially infected&apos; speed: %&apos;speed&apos;" type="reporter" category="other"><header></header><code></code><translations></translations><inputs><input type="%n"></input><input type="%n"></input><input type="%n"></input></inputs><script><custom-block s="initialize simulation %n %n %n"><block var="population"/><block var="percent initially infected"/><block var="speed"/></custom-block><block s="show"></block><block s="doRepeat"><block var="population"/><script><block s="createClone"><l><option>myself</option></l></block></script></block><block s="hide"></block><block s="doSetVar"><l>start time</l><block s="reportDate"><l><option>time in milliseconds</option></l></block></block><block s="doSetVar"><l>running</l><block s="reportBoolean"><l><bool>true</bool></l></block></block><block s="doWaitUntil"><block s="reportEquals"><block var="number infected"/><block var="population"/></block></block><block s="doSetVar"><l>elapsed time</l><block s="reportQuotient"><block s="reportDifference"><block s="reportDate"><l><option>time in milliseconds</option></l></block><block var="start time"/></block><l>1000</l></block></block><block s="doBroadcast"><l>vanish</l></block><block s="doReport"><block var="elapsed time"/></block></script></block-definition><block-definition s="average time for disease spread with population size: %&apos;size&apos;" type="reporter" category="operators"><header></header><code></code><translations></translations><inputs><input type="%n"></input></inputs><script><block s="bubble"><l></l></block><block s="doReport"><block s="reportQuotient"><block s="reportCombine"><block s="reportMap"><block s="reifyReporter"><autolambda><custom-block s="simulate disease, population: %n percent infected: %n speed: %n"><block var="size"/><l>10</l><l>2</l></custom-block></autolambda><list></list></block><block s="reportNumbers"><l>1</l><l>10</l></block></block><block s="reifyReporter"><autolambda><block s="reportSum"><l></l><l></l></block></autolambda><list></list></block></block><l>10</l></block></block></script></block-definition><block-definition s="initialize clone" type="command" category="other"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doIf"><block s="reportLessThan"><block var="number infected"/><block s="reportProduct"><block s="reportQuotient"><block var="percent initially infected"/><l>100</l></block><block var="population"/></block></block><script><block s="doChangeVar"><l>number infected</l><l>1</l></block><block s="doSetVar"><l>infected?</l><block s="reportBoolean"><l><bool>true</bool></l></block></block><block s="doSwitchToCostume"><l>sick</l></block></script></block><block s="doGotoObject"><l><option>random position</option></l></block><block s="doFaceTowards"><l><option>random position</option></l></block></script></block-definition><block-definition s="touching infected person?" type="predicate" category="other"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doForEach"><l>item</l><block s="reportGet"><l><option>neighbors</option></l></block><script><block s="doIf"><block s="reportAnd"><block s="reportNot"><block var="infected?"/></block><block s="reportAnd"><block s="reportTouchingObject"><block var="item"/></block><block s="reportAskFor"><block var="item"/><block s="reifyReporter"><autolambda><block var="infected?"/></autolambda><list></list></block><list></list></block></block></block><script><block s="doReport"><block s="reportBoolean"><l><bool>true</bool></l></block></block></script></block></script></block><block s="doReport"><block s="reportBoolean"><l><bool>false</bool></l></block></block></script></block-definition><block-definition s="initialize simulation %&apos;pop&apos; %&apos;inf&apos; %&apos;sp&apos;" type="command" category="other"><header></header><code></code><translations></translations><inputs><input type="%n"></input><input type="%n"></input><input type="%n"></input></inputs><script><block s="doSetVar"><l>population</l><block var="pop"/><comment w="216.66666666666666" collapsed="true">Make global so &quot;when I start&quot; can use it.</comment></block><block s="doSetVar"><l>percent initially infected</l><block var="inf"/></block><block s="doSetVar"><l>speed</l><block var="sp"/></block><block s="doSetVar"><l>infected?</l><block s="reportBoolean"><l><bool>false</bool></l></block></block><block s="doSetVar"><l>running</l><block s="reportBoolean"><l><bool>false</bool></l></block></block><block s="doSetVar"><l>number infected</l><l>0</l></block><block s="doSwitchToCostume"><l>well</l></block><block s="setScale"><l>50</l></block></script></block-definition></blocks><variables><variable name="number infected"><l>200</l></variable><variable name="running"><bool>true</bool></variable><variable name="start time"><l>1616502063857</l></variable><variable name="elapsed time"><l>32.369</l></variable><variable name="population"><l>200</l></variable><variable name="percent initially infected"><l>10</l></variable><variable name="speed"><l>2</l></variable></variables></project><media name="U5L2S2-Simulation Student Alex" app="Snap! 6, https://snap.berkeley.edu" version="1"></media></snapdata>