One way to simulate lightning is with a random walk. In this assignment you will create a program that uses a random walk to seemingly shoot lightning from one side of the screen to the other every time the mouse is pressed.

1. Start by forking this repo.
2. Watch this Shiffman video about the random() function.
3. Open the Lightning.pde file. You'll need to add some code.
4. At the top of the program, declare 4 int variables startX, startY, endX and endY. Initialize startX to 0, startY to 150, endX to 0 and endY to 150
5. void setup() needs to set the strokeWeight() and background() of your sketch
6. void draw() needs to do two things:

• set the stroke()color of the lightning bolt to some random value using random()
• a while loop that repeats the following until the endX is off the screen:
  1. set endX to startX plus a random integer from 0 to 9
  2. set endY to startY plus a random integer from -9 to 9
  3. draw a line() with endpoints startX,startY,endX,endY
  4. set startX equal to endX
  5. set startY equal to endY

7. void mousePressed() needs to set startX,startY,endX,endY back to their original values.
8. This is one of the most important steps! If we all stopped here, everybody's lightning would look the same. That's no fun. In this step you'll make your lightning unique. Take your time on this step, be creative, and make yours look different from anyone else's! Below are some examples of other students' work. Browse those for ideas.
9. When you've got a good draft, ask a colleague for feedback. Incorporate that feedback and give that person credit with a comment in your code.
10. Submit your assignment. (How? Click here.)

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