The first set of boxes in spawnProjectile is the speed on the x, y, and z axis, in order. For example, if I put "0 10 0", it would go up on the y axis (north) with a speed of 10.
The second set of boxes is the variance in speed. For example, if I put "0 10 0" in the first set, and "0 0 3" in the second set, it would go up on the y axis (north) with a speed of 10, but also go between [0 + 3] and [0 - 3] (first number +- variance) speed on the z axis (up/down).