This uses C please help me I have 2 hours to submit it

Write a function that prints the following pattern, based on the input value for N. If N=3, it should print 1 2 3 1 2 3 If N = 4, it should print 1 2 3 4 1 2 3 4 9 8 7 6 9 8 7 6 If N = 5, it should print 1 2 3 4 5 1 2 3 4 5 9 8 7 6 5 9 8 7 6 5 1 2 3 4 5 If N = 6, it should print 1 2 3 4 5 6 1 2 3 4 5 6 9 8 7 6 5 4 9 8 7 6 5 4 1 2 3 4 5 6 1 2 3 4 5 6