Version 9
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There is a world with multiple randomly placed, randomly sized
stationary particle. There are buttons to play, step, and 
reset the model. Stepping the model causes the particles to 
move. If a partical hits a wall, it bounces off. Reciting
the model places the partiles at a new random
location with a new random size. Playing the model causes it
to step redeploy. resetting the model causes it to stop 
playing. Once the play botton has clicked, it canot be 
clicked again until the model is reset.	

Version 8
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There is a world with one randomly placed, randomly sized
stationary particle.There are buttons to play, step, and 
reset the model. Stepping the model causes the particle to 
move. If the partical hits a wall, it bounces off. Reciting
the model places the partile at a new random
location with a new random size. Playing the model causes it
to step redeploy. resetting the model causes it to stop 
playing. oOnce the play botton has clicked, it canot be 
clicked again until the model is reset		
1. Add an if-statement to the step function that checks if the particle has gone
	past a wall and if it has, reverses the direction of the particles.
2. anywhere there is code for centerX and velocity, add code for centerY and 
	velocityY

Version 7
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There is a world with one randomly placed, randomly sized
stationary particle.There are buttons to play, step, and 
reset the model. Stepping the model causes the particle to 
move Reciting the model places the partile at a new random
location with a new random size. Playing the model causes it
to step redeploy. resetting the model causes it to stop 
playing. Once the play botton has clicked, it canot be 
clicked again until the model is reset.
1. In the reset function, call clearInterval
2. In the play function, add a line to disable the play button
3. In the reset function, add a line to enable the play button


Version 6
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There is a world with one randomly placed, randomly sized
stationary particle.There are buttons to play, step, and 
reset the model. Stepping the model causes the particle to 
move Reciting the model places the partile at a new random
location with a new random size. Playing the model causes it
to step redeploy.
1. Add an html botton element for the Play botton
2. Define a JavaScript function that is called whenever the botton is clicked
2a. the function will call the step function rapidity using setInterval


Version 5
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There is a world with one randomly placed, randomly sized stationary particle.
There are buttons to step and reset the model. Stepping the model causes the
particle to move, reciting the model places the partile at a new random
location with a new random size.
1. Add an html botton element for the reset botton
2. Define a JavaScript function that is called whenever the botton is clicked
2a.The function will basically do what the onload function already does.
2b.except we also have to clear the canvas
3. Add an html botton element for the set
4. Define a JavaScript function that is called whenever the botton is clicked
4a.change the x position of the center of the particle by 1


Version 4
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There is a world with one  randomly placed, randomly sized stationary particle.
1.get random numbers for centerX, centerY, and radius
2. make sure the circle is inside the walls

Version 3
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There is a world with one stationary particle.
1. Make canvas bigger
2. Create a JavaScript file
3. Link it ot the HTMl file
4. Add JS to draw a circle on the canvas

Version 2
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1. Create an HTML canvas element
2. Style it using CSS (give it a border and background color)

Version 1
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1. Add our name
2. Add description

Version 0
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1. Download template
2. Upload the template in web browser
3. Open the template in our browser