atan2(dy,dx) function for scratch. returns to the r%atan2 variable which you can then use returns in degrees, not radians because its scratch theres probably already atan2 functions on scratch but im sharing it anyway because i found it useful for the demo, pick a coordinate and then arrows to move around
main uses: point towards a point find the angle between two points polar coordinate stuff transforming vectors you don't need to copy anything except the "atan2" function. the rest is just a demonstration (arrows to move)
