Bobby Carrot level creator

How to create a level :
Open "in.txt". There are four numbers. The first one is the width of the level, the second is the height, the third is the x position of Bobby at the beginning and the fourth is Bobby's y position.
Change them if you want, and execute "bobby tool.exe". Custom your level, then close the window.
Open "out.txt". There is the lua code of the level.