;;fillroom with the last prop dropped based on its dimensions
{ 0 y = { 0 x = 
0 LOOSEPROP PROPDIMENSIONS xy = yx =
0 LOOSEPROP propid =
{ propid x y ADDLOOSEPROP yx x += }
{ x ROOMWIDTH <= } While xy y += }
{ y ROOMHEIGHT <= } While
"" CHATSTR = } CHATSTR "fillroom3" == If