map = ""

WIDTH = 20
HEIGHT = 10
fn create{
    repeat(HEIGHT){ y = _
        repeat(WIDTH){ x = _
            if(rnd % 2 == 0){
                block = "#"
            } else{
                block = "."
            }
                map = map .. block
            }
    }
} create()

fn draw{
    buffer = ""
    repeat(HEIGHT){ y = _
        repeat(WIDTH){ x = _
            index = x + y * WIDTH
            getChar(char, map, index)
            if(char == "#"){
                buffer = buffer .. "#"
            } else {
                buffer = buffer .. ".."
            }
        }
        buffer = buffer .. "\n"
    }
    print(buffer)
} draw()

repeat(10){
    buffer = ""
    for(y = 0; y < HEIGHT; y++){
        for(x = 0; x < WIDTH; x++){

            count = 0
            for(y_ = -1; y_ <= 1; y_++){
                for(x_ = -1; x_ <= 1; x_++){
                    if(x_ == 0 and y_ == 0){} else {
                        if(
                            x + x_ >= 0 and x + x_ < WIDTH and y + y_ >= 0 and y + y_ < HEIGHT
                        ){
                            i = (x + x_) + (y + y_) * WIDTH
                            getChar(char, map, i)
                            if(char == "#"){
                                count++
                            }
                        }
                    }
                }
            }
            
            i = x + y * WIDTH
            getChar(char, map, i)

            if(count == 3){
                buffer = buffer .. "#"
            } else {
                if(count == 2 and char == "#"){
                    buffer = buffer .. "#"
                } else {
                    buffer = buffer .. "."
                }
            }
            
        }
    }

    map = buffer
    draw()
}