5.  At layer Mask draw a filled white oval which should be bigger than height of the text and convert it as movie clip.                      6. Insert a frame at Frame40 in the Mask layer and inserting a keyframe at Frame40 in the Text layer.

            

           7. Create a Motion Tween for the mask layer. At Frame50 of layer Mask, drag our symbol horizontally over the text.
                       
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