Thank you for your help,
The expression works fine but i’m still trying to figure out how to use the interpolation many times. i checked the links you sent me but its quit advance to my expression experience.
What i’m trying to achieve is applying this interpolation expression to position property of a layer to move from position1 to position2 triggered by Marker1 till Marker2 and hold till marker3 to move from position2 to position3 until marker4.