OK. New day, new fresh idea… I did solved this one. By using a mathematical expression for spiral (that I googled) and adding a time*speed to X value. It looks like this:
radius=100
angle=time*200
x=(radius*Math.cos(degreesToRadians(angle)))-(time*21)
y=radius*Math.sin(degreesToRadians(angle))
z=0
centre=[1790,760,0]
add(centre,[x,y,z])
Yet if I would need any other moving path, lets say round a person’s silhouette, the path I can not express by mathematics, I would be stuck. So if anyone knows the principle solution, I would be glad to learn it.