When you'd like to have a shape motion along a path,Cool Motion will help you accomplish your desire.Cool Motion provides several tools for you to draw guide path and makes the work of guiding motion quite easy. Just do the following steps to create the Guideline Motion:
Step1: Create an instance in the canvas and insert Key frame in any place in the timeline .
Step2: Add another layer, right click the button and select"Guide".
Cool Motion creates a new layer above the selected layer with a guide icon to the left of the layer name.
Step3: Use the Pen, Pencil, Line to draw the desired path.
Step4: Rignt click the layer that containing the instance and select "guided"
Step5: Snap the center to the beginning of the line in the first frame, and to the end of the line in the last frame.For best snapping results, drag the symbol by its registration point.
Step6: Create a motion tween in the layer that containing the instance.
Step7: To hide the motion guide layer and the line so that only the object’s movement is visible while you work, click in the Eye column on the motion guide layer.