Hi I have a function to place bombs, and a for loop that places explosions on the tiles where possible.

My problem is that I can't remove the explosions after a while. I've tried everything I can come up with so now I turn here as a last resort.

The function looks like this:

function Bomb(){
var placebomb = false;
    if(placeBomb && player.bombs != 0){
        map[player.Y][player.X].object = 2;
        var bombX = player.X;
        var bombY = player.Y;
        placeBomb = false;
        player.bombs--;
        setTimeout(explode, 3000);
    }
    function explode(){
    var explodeNorth = true;
    var explodeEast = true;
    var explodeSouth = true;
    var explodeWest = true;

    map[bombY][bombX].explosion = 1;
    delete map[bombY][bombX].object;

    for(i=0;i<=player.bombRadius;i++){  
        if(explodeNorth && map[bombY-i][bombX]){
            if(!map[bombY-i][bombX].wall){
                if(!map[bombY-i][bombX].object){
                    map[bombY-i][bombX].explosion = 1;
                }
                else                
                    var explodeNorth = false;
                    delete map[bombY-i][bombX].object;
                    map[bombY-i][bombX].explosion = 1;
            }
            else
                var explodeNorth = false;
        }

        if(explodeEast && map[bombY][bombX+i]){
            if(!map[bombY][bombX+i].wall){  
                if(!map[bombY][bombX+i].object){
                    map[bombY][bombX+i].explosion = 1;
                }
                else
                    var explodeEast = false;
                    delete map[bombY][bombX+i].object;
                    map[bombY][bombX+i].explosion = 1;
            }
            else
                var explodeEast = false;
        }

        if(explodeSouth && map[bombY+i][bombX]){    
            if(!map[bombY+i][bombX].wall){
                if(!map[bombY+i][bombX].object){
                    map[bombY+i][bombX].explosion = 1;
                }
                else
                    var explodeSouth = false;
                    delete map[bombY+i][bombX].object;
                    map[bombY+i][bombX].explosion = 1;
            }
            else
                var explodeSouth = false;
        }

        if(explodeWest && map[bombY][bombX-i]){
            if(!map[bombY][bombX-i].wall){
                if(!map[bombY][bombX-i].object){
                    map[bombY][bombX-i].explosion = 1;
                }
                else
                    var explodeWest = false;
                    delete map[bombY][bombX-i].object;
                    map[bombY][bombX-i].explosion = 1;

            }
            else
                var explodeWest = false;
        }

    }
    player.bombs++;
    }
}

If anyone can think of a good way to remove the explosion after a delay please help.