simulate loading time
lazy redaw time
maximum columns
reload all images
redraw canvas

origin alignment. pick a string combination of: "top", "left", "bottom", "right"
column alignment array
row alignment array
column gap array
row gap array

column minwidth array
row minheight array
column maxwidth array
row maxheight array
recompute grid

amount of columns
push columns
unshift columns
pop columns
shift columns
current column offset

click on one of the cells to highlight its sprite's rectangle