class pixel:
    width = 2
    height = 2
    pixel = [[0,0],[0,0]]
    def __init__(self):
        pass
    def set_width(self,x):
        if (x >= self.width):
            for list in self.pixel:
                for i in range(x - self.width):
                    list.append(0)
        self.width = x
    def set_height(self,y):
        if (y >= self.height):
            temp = []
            for i in range(self.width):
                temp.append(0)
            for i in range(y-self.height):
                self.pixel.append(temp)
        self.height = y
    def get_width(self):
        return self.width
    def get_height(self):
        return self.height
    def set_pixel(self,x,y,value):
        self.pixel[x][y] = value
    def show_pixel(self):
        print self.pixel
if __name__ == "__main__":
    p = pixel()
    p.set_width(5)
    p.set_height(5)
    for i in range(4):
        for j in range(4):
            p.set_pixel(i+1,j+1,i+j)
    print p.pixel