Each box must be completely green.

LTR			RTL
HTB	VRL	VLR	HTB	VRL	VLR
Do not scroll any box below.
						start
						safe center
						safe end
						center
						end
						unsafe center
						unsafe end
Scroll each box below to the top left.
						start
						safe center
						safe end
						center
						end
						unsafe center
						unsafe end
Scroll each box below to the bottom right.
						start
						safe center
						safe end
						center
						end
						unsafe center
						unsafe end