toying with arrays

when using arrays they start at 0 so

32 images would be 0 to 31

try adding -1 to
tilesx
tilesy

ie

Function Drawtiles()
	'DebugStop()
	For Local i% = 0 Until tilesx-1
		For Local j% = 0 Until tilesy-1
			DrawImage (imagemap[i,j],i*twidth,j*theight)
		Next
	Next
	DebugLog "Tiles Drawn"
End Function

toying with arrays - help pls