I have the following situation which I want to use expression to control.
1) I want ball A follow the position of ball B
2) while ball A following ball B, I want the distant between these two object vary over time ( I want to use a null to control this " let say, when the null move up in Y axis, the distant between the two ball become bigger" )
3) when ball B Stop, ball A stop at where it is, not continue to move and end at ball B position.
any hints and tip would be very appreciated.
Thanks in advance.