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7 "b_nblocks" store

15 23 71 51 54 99 114
b_nblocks mkarrayp "b_blocks" store

 6  3  4  7  2  1   5
b_nblocks mkarrayp "b_blockclrs" store

@defun "b_getblock" { #arg: block idx [0..(b_nblocks-1)]
	"b_blocks" swapoutvar swap arridx swap "b_blocks" gstore
}

@defun "b_drawblock" { #args: x y blockidx
	dup "blockidx" store
	b_getblock "blockbits" store
	"y" store
	"x" store

	blockbits 16 % "row1" store
	blockbits 16 / "row2" store

	x "xx" store
	row1 while
		row1 2 % if
			xx y blockidx io_gsquare
		end
		xx 1 + "xx" store
		row1 2 / "row1" store
	row1 end

	y 1 + "y" store

	x "xx" store
	row2 while
		row2 2 % if
			xx y blockidx io_gsquare
		end
		xx 1 + "xx" store
		row2 2 / "row2" store
	row2 end
}