1.File>>>NEW
2.Add Text
3.Use gradient tool as i do in the video
4.Open animation Window>>>Animation
5.drag the line/object you wanna scan to the beggining of the text
6.create a new frame put the line/object to the end of the text.
7.Click the button I do in the video
8.Set frames to add as 20
9 Go to the last frame then click the button again frames to add 20 (Drop down box to beginning)Or something .
Watch video For a better version of the TUT
TADDAAAA