# All Steps
1. Model
2. Draw handler
3. Tick handler
4. Key handler?
5. Mouse handler?
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# 1. Decide model
* What will the computer remember in order to draw a scene?
- the moving parts
- image or number (usually)
* Write down type of model: image, number, string.
* Make an example (used in later testing).
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# 2. Draw handler
* How will you draw the model on the screen?
- non-moving parts go here
- place image in appropriate spots
* Write and test this function!
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# 3. Tick handler
* How will the model change from second to second?
- in comes old model
- out goes new model
* Write function and test a single step first!