Easy and effective way:
+ System: Always (every tick)
-> Sprite: Set position to clamp(.x, 0, LayoutWidth ), clamp(.y, 0, LayoutHeight )
Tell that to people who are still scared or never found system expressions <img src="smileys/smiley1.gif" border="0" align="middle" />
We're trying to help using simple and understandable things for begginers <img src="smileys/smiley1.gif" border="0" align="middle" />