Visulalizing the convolution sum

The convolution sum is given by

$$y(n) = \sum_{k=0}^{N-1} h(k)x(n-k).$$

n	0	1	2	3	4	5
x(n)	1	1	0	0	0	0
h(n)	1	3	3	1	0	0
h(0)x(n-0)	1	1	0	0	0	0
h(1)x(n-1)		3	3	0	0	0
h(2)x(n-2)			3	3	0	0
h(3)x(n-3)				1	1	0
y(n)	1	4	6	4	1	0