I don't want to control a timer in the main code for each sprite manually. (I don't know how many sprites there will be..) I would like each sprite has an independent flashing behaviour.
Use types, then you won't need to know how many in advance and the flashing can be handled 'manually automatically', if you follow. Quick example that you can surely improve upon:
Open in online IDEGraphics3D 800,600,0,2 cam=CreateCamera() SetBuffer BackBuffer() Type flashyStar Field sprite Field flashCount Field flashIncrement End Type currentFlashyStar.flashyStar=Null flashyStarTex=CreateTexture(64,64) Oval 4,4,60,60,True CopyRect 0,0,64,64,0,0,BackBuffer(),TextureBuffer(flashyStarTex) For i=0 To 99 currentFlashyStar=New flashyStar currentFlashyStar\sprite=CreateSprite() currentFlashyStar\flashCount=Rand(0,99) currentFlashyStar\flashIncrement=Rand(1,5) EntityTexture currentFlashyStar\sprite,flashyStarTex PositionEntity currentFlashyStar\sprite,Rnd(-100,100),Rnd(-100,100),100 Next While Not KeyHit(1) updateStars() RenderWorld Flip Wend Function updateStars() For currentFlashyStar.flashyStar=Each flashyStar currentFlashyStar\flashCount=currentFlashyStar\flashCount+currentFlashyStar\flashIncrement If currentFlashyStar\flashCount>99 Then currentFlashyStar\flashCount=currentFlashyStar\flashCount-100 If currentFlashyStar\flashCount>49 HideEntity currentFlashyStar\sprite Else ShowEntity currentFlashyStar\sprite EndIf Next End Function