Is this what you mean?
Graphics 800,600,32,2 SetBuffer BackBuffer() Global timer,count=1000,seconds=60 Function CreateTimer_() timer=MilliSecs() End Function Function UpdateTimer_() If MilliSecs() > timer+count seconds=seconds-1 timer=MilliSecs() EndIf If seconds=0 Then Notify "COMPLETE!":End End Function CreateTimer_() Repeat If KeyHit(1) End EndIf Cls Text 10,10,seconds Flip UpdateTimer_() Forever