Click flag. The sine function, in its simplest form, goes back and forth in a line, slowing down before it turns back in the other direction, simply: sine (time) From this sine motion we derive the circle and the sine wave.
One sprite just goes up and down on the Y axis. The code is sine (degrees, which changes with time).This is the motion of bouncing spring. Another sprite goes sideways on the X axis (really it is a cosine that we expressed as a sine), as seen in a simple pendulum. Really it is the same as the sine motion of a spring. A third sprite (red) matches the X and Y coordinates of the first two sprites resulting in a circle. A fourth sprite (yellow) matches the Y coordinate and moves forward a distance of pi times the total height (also the circle's diameter), the same as the circle's circumference. Note we don't start with the circle, but with the simpler sine components.
