I.5 Semester I Review 5

Drifter

Drifter. A circle moves around inside a rectangle. There are two different modes of motion: small steps (activated by “s”) and big steps (activated by “b”). The arrows let you move the circle.

Example: s left left moves two small steps left, then b up right up takes three big steps (up, right, and up in that order).

Extras: Lite Review Questions

1. Take a posn and a color. Give a new color that has:

   • green = same as the original color
   • red = original red plus x value of posn
   • blue = original blue minus y value of posn

2. Math-er: takes in three numbers code, a, and b, puts out one number:

   • when code is 1, put out the sum of a and b
   • when code is 2, put out the positive difference between a and b
   • when code is any other number multiply a and b for the answer