I have pasted 3 pictures on the form on top of each other.I have set a timer to keep the pictures rolling in the timer procedure.I have written a do case-end case statment with visible properties of the three images to false and true , so one image shows at one time.The image no 1 and 2 continue blinking , but the 3rd image only blinks one and then not at all.What am I doing wrong? The code is as follows....

do case
thisform.image1.visible=.t.
thisform.image1.visible=.f.
thisform.image2.visible=.t.
thisform.image3.visible=.f.

thisform.image2.visible=.t.
thisform.image2.visible=.f.
thisform.image3.visible=.t.
thisform.image1.visible=.f.

thisform.image3.visible=.t.
thisform.image3.visible=.f.
thisform.image2.visible=.t.
thisform.image1.visible=.f.

thisform.image2.visible=.t.
thisform.image2.visible=.f.
thisform.image1.visible=.t.
thisform.image3.visible=.f.

endcase