Microsoft Small Basic

Program Listing:

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<object id='sbapp' data='data:application/x-silverlight-2,' type='application/x-silverlight-2' width='640' height='480'>
    <param name='source' value='http://smallbasic.com/program/ClientBin/SBWeb.xap'/>
    <param name='onError' value='onSilverlightError' />
    <param name='background' value='white' />
    <param name='minRuntimeVersion' value='3.0.40624.0' />
    <param name='autoUpgrade' value='true' />
    <param name='initParams' value='programId=Square' />
</object>

' Show the tortoise

' Make the tortoise move as fast as possible

' Do the following 4 times

'    Change the color of the line the tortoise draws to blue

'    Move the tortoise 50 pixels

'    Turn the tortoise 90 degrees to the right

'Repeat