I want to graphically represent different periods of production time, i.e.
manufacture, change over, clean down, etc. by blocking out rows of cells.
e.g. convert 8.15,1.5,6.45,1 into a row showing 8.15 cells blocked in say
green, followed by 1.5 cells blocked in red, followed by 6.45 cells blocked
in green, followed by 1 cell blocked in black. It will be a rough cut
capacity planning spread sheet.