<snapdata remixID="9299797"><project name="U5L2-DiseaseSpread" app="Snap! 5.4, http://snap.berkeley.edu" version="1"><notes></notes><thumbnail>data:image/png;base64,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AoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQIHLFxAWmhEwHPAAAAAElFTkSuQmCC</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="0" y="0" heading="40" scale="1" volume="100" pan="0" rotation="1" draggable="false" costume="1" color="80,80,80,1" pen="tip" id="8"><costumes><list id="9"><item><costume name="Healthy" center-x="10" center-y="10" image="data:image/png;base64,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" id="10"/></item><item><costume name="Sick" center-x="10" center-y="10" image="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAw0lEQVQ4T2NkwAH+czL8xyUHEmf8zsCITR5DUIbhP+djTsZv+AyDycl+/8/1BGQ0EkAxUI71v/FDFsYzxBgGUyP/57/Jo9+MZ2F8uIFKbP917zIzXiLFMJha5b//9e79YrwMDgqYIKEwI2QRLEzBBlJqGNy73xkYqW8gtVwHd+WogYRSB0F5RqqH4eBPhzTJepQailw2YpSHpEYSekGLtdRV5Pgvf4+R8QG+NKL0/7/C/R+MD9HVYDUQWRG6i3EV/TA9ACXMST8t/U1DAAAAAElFTkSuQmCC" id="11"/></item></list></costumes><sounds><list struct="atomic" id="12"></list></sounds><blocks></blocks><variables><variable name="IsClone?"><bool>false</bool></variable></variables><scripts><script x="16" y="315"><block s="receiveMessage"><l>done</l></block><block s="doIf"><block s="reportNot"><block var="IsClone?"/></block><script><block s="bubble"><block s="getTimer"></block></block><block s="show"></block></script></block></script><script x="13" y="227"><block s="receiveOnClone"></block><custom-block s="CloneActions"></custom-block></script><script x="25" y="149"><block s="receiveGo"></block><custom-block s="StartSim"></custom-block></script><script x="10" y="82"><custom-block s="average time of disease spread with population size: %n"><l></l></custom-block></script><script x="22" y="450"><custom-block s="AllInfected?"></custom-block></script></scripts></sprite><watcher var="Population Size" style="normal" x="10" y="31.000001999999995" color="243,118,29"/><watcher var="Movement Speed" style="normal" x="10" y="52.00000399999999" color="243,118,29"/><watcher scope="Stage" s="getTimer" style="normal" x="10" y="73.00000599999998" color="4,148,220"/><watcher scope="Sprite" var="IsClone?" style="normal" x="10" y="94.00000799999998" color="243,118,29" hidden="true"/><watcher var="% infected" style="normal" x="11" y="9" color="243,118,29"/></sprites></stage><hidden></hidden><headers></headers><code></code><blocks><block-definition s="average time of 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="doReport"><l></l></block></script></block-definition><block-definition s="Infected?" type="command" category="other"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doIf"><block s="reportEquals"><block s="getCostumeIdx"></block><l>1</l></block><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="reportAnd"><block s="reportTouchingObject"><block var="item"/></block><block s="reportEquals"><block s="reportAttributeOf"><l><option>costume #</option></l><block var="item"/></block><l>2</l></block></block><block s="reportEquals"><block s="getCostumeIdx"></block><l>1</l></block></block><script><block s="doSwitchToCostume"><l>Sick</l></block><block s="doSetVar"><l>% infected</l><block s="reportSum"><block var="% infected"/><block s="reportQuotient"><l>100</l><block var="Population Size"/></block></block></block></script></block></script></block></script></block></script></block-definition><block-definition s="SetVars" type="command" category="other"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doAsk"><l>Population size?</l></block><block s="doSetVar"><l>Population Size</l><block s="getLastAnswer"></block></block><block s="doAsk"><l>% of population initially infected?</l></block><block s="doSetVar"><l>% infected</l><block s="getLastAnswer"></block></block><block s="doAsk"><l>Movement speed?</l></block><block s="doSetVar"><l>Movement Speed</l><block s="getLastAnswer"></block></block></script></block-definition><block-definition s="PrimeSim" type="command" category="other"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doRepeat"><block s="reportDifference"><block var="Population Size"/><block s="reportProduct"><block s="reportRound"><block s="reportProduct"><block var="% infected"/><block var="Population Size"/></block></block><l>.01</l></block></block><script><block s="createClone"><l><option>myself</option></l></block><block s="doGotoObject"><l><option>random position</option></l></block></script></block><block s="doSwitchToCostume"><l>Sick</l></block><block s="doRepeat"><block s="reportProduct"><block s="reportRound"><block s="reportProduct"><block var="% infected"/><block var="Population Size"/></block></block><l>.01</l></block><script><block s="createClone"><l><option>myself</option></l></block><block s="doGotoObject"><l><option>random position</option></l></block></script></block></script></block-definition><block-definition s="StartSim" type="command" category="other"><header></header><code></code><translations></translations><inputs></inputs><script><block s="gotoXY"><l>0</l><l>0</l></block><block s="doSetVar"><l>IsClone?</l><block s="reportBoolean"><l><bool>false</bool></l></block></block><block s="show"></block><block s="doSwitchToCostume"><l>Healthy</l></block><custom-block s="SetVars"></custom-block><custom-block s="PrimeSim"></custom-block><block s="hide"></block><block s="doResetTimer"></block></script></block-definition><block-definition s="CloneActions" type="command" category="other"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doSetVar"><l>IsClone?</l><block s="reportBoolean"><l><bool>true</bool></l></block></block><block s="turn"><block s="reportRandom"><l>1</l><l>360</l></block></block><block s="doForever"><script><custom-block s="AllInfected?"></custom-block><block s="forward"><block var="Movement Speed"/></block><block s="bounceOffEdge"></block><custom-block s="Infected?"></custom-block></script></block></script></block-definition><block-definition s="AllInfected?" type="command" category="other"><header></header><code></code><translations></translations><inputs></inputs><script><block s="doIf"><block s="reportEquals"><block var="% infected"/><l>100</l></block><script><block s="doBroadcast"><l>done</l></block><block s="doStopThis"><l><option>this script</option></l></block></script></block></script></block-definition></blocks><variables><variable name="% infected"><l>98.3333333333333</l></variable><variable name="Population Size"><l>30</l></variable><variable name="Movement Speed"><l>10</l></variable></variables></project><media name="U5L2-DiseaseSpread" app="Snap! 5.4, http://snap.berkeley.edu" version="1"></media></snapdata>