Great after effects expressions.
Circle Fun
This generates perfect circular motion centered around the original position of the layer. I recommend that you map the radius and
cycle inputs to Expresso sliders, and the phase input to an Expresso angle.
Apply this expression to the position of the layer
radius = 75; // the radius of the circle
cycle = 1; // number of seconds to complete a circle; higher value = slower
if(cycle ==0){cycle = 0.001;} //avoids a “divide by zero” error
phase = 27; // initial angle in degrees from bottom
reverse = 1; // 1 for ccw, -1 for cw
x = Math.sin( reverse * degrees_to_radians(time * 360 / cycle + phase));
y = Math.cos(degrees_to_radians(time * 360 / cycle + phase));
add(mul(radius, [x, y]), position)
