Simple re size sprite smooth loop?

I can not resize a sprite, with smooth motion and repetitive as in GIF attachment in this post. All I've got is this:

dl.dropbox.com/s/gyji37mcvhc99ix/Ball.capx

Only grows to infinity. I want a loop of 80px to 90px eg and smooth movement .. :( Please help.Excuse my English.<img src="http://i45.tinypic.com/107qfqq.gif" border="0" />

I gave your sprite an instance boolean variable called growing. Set growing to true when width is 80px or below, and set growing to false when it's 90px or above.

Every tick, if growing is true, increase size. If it's false, decrease size.

Updated capx.

Thank you very much!! is exactly what I needed. :):)

You may also be interested in the Sine Behavior, which would produce a similar effect.

Capx with the effects side by side.

zatyka thanks for sharing that. I've never actually used the sine behaviour before, believing it was restricted to movement only as seen in the platformer template.

zatyka Thank you very much!! movement is smoother still, it's great! GeometriX code for me to do other things served also as a laser beam that also needed, greetings and thanks for your help!!