var _tempList;

while(ds_grid_height(genList) != 1){
_tempList = ds_grid_create(3,1);

for (var i = 1; i < ds_grid_height(genList);i++){
var rOpen = (choose(true,false) && rmGrid[# genList[# 0,i]+1, genList[# 1,i]] == null && rmGrid[# genList[# 0,i]+1, genList[# 1,i]] != undefined)
var uOpen = (choose(true,false) && rmGrid[# genList[# 0,i], genList[# 1,i]-1] == null && rmGrid[# genList[# 0,i], genList[# 1,i]-1] != undefined)
var lOpen = (choose(true,false) && rmGrid[# genList[# 0,i]-1, genList[# 1,i]] == null && rmGrid[# genList[# 0,i]-1, genList[# 1,i]] != undefined)
var dOpen = (choose(true,false) && rmGrid[# genList[# 0,i], genList[# 1,i]+1] == null && rmGrid[# genList[# 0,i], genList[# 1,i]+1] != undefined)

if rOpen+uOpen+lOpen+dOpen = 0{
    if _tempList[# 2,i] != undefined{
        rmGrid[# genList[# 0,i], genList[# 1,i]] = power(_tempList[# 2,i],2);
        break;
    }
}else{

    var _right = rOpen || genList[# 2,i] == 1;
    var _up = uOpen || genList[# 2,i] == 2;
    var _left = lOpen || genList[# 2,i] == 3;
    var _down = dOpen || genList[# 2,i] == 4;

    rmGrid[# genList[# 0,i], genList[# 1,i]] = right*_right+up*_up+left*_left+down*_down;

}

genList[# 3,i] = undefined;
//for (var i = 1; i < ds_grid_height(_tempList); i++){
//  _tempList[# 2,i] = null;
//  _tempList[# 3,i] = null;
//  _tempList[# 4,i] = null;
//  _tempList[# 5,i] = null;
//}
if rOpen = true && genList[# 2,i] != 1{
    ds_grid_resize(_tempList,3,ds_grid_height(_tempList)+1);
    _tempList[# 0,ds_grid_height(_tempList)-1] = genList[# 0,i]+1;
    _tempList[# 1,ds_grid_height(_tempList)-1] = genList[# 1,i];

    _tempList[# 2,ds_grid_height(_tempList)-1] = 3; // set next rooms left door open

}
if uOpen = true{
    ds_grid_resize(_tempList,3,ds_grid_height(_tempList)+1);
    _tempList[# 1,ds_grid_height(_tempList)-1] = genList[# 1,i]-1;
    _tempList[# 0,ds_grid_height(_tempList)-1] = genList[# 0,i];

    _tempList[# 2,ds_grid_height(_tempList)-1] = 4; // set next rooms bottom door open
}
if lOpen = true{
    ds_grid_resize(_tempList,3,ds_grid_height(_tempList)+1);
    _tempList[# 0,ds_grid_height(_tempList)-1] = genList[# 0,i]-1;
    _tempList[# 1,ds_grid_height(_tempList)-1] = genList[# 1,i];

    _tempList[# 2,ds_grid_height(_tempList)-1] = 1; // set next rooms right door open
}
if dOpen = true{
    ds_grid_resize(_tempList,3,ds_grid_height(_tempList)+1);
    _tempList[# 1,ds_grid_height(_tempList)-1] = genList[# 1,i]+1;
    _tempList[# 0,ds_grid_height(_tempList)-1] = genList[# 0,i];

    _tempList[# 2,ds_grid_height(_tempList)-1] = 2; // set next rooms up door open
}
}
ds_grid_copy(genList,_tempList);
ds_grid_destroy(_tempList);
}