Check out my program

#include <stdio.h>
#include <unistd.h>
#define LEN 15
int print(i,j) {
for (; i < LEN; ++i)
printf(" ");
puts("a");
usleep(50000);
return 0;
}
int main(void)
{
int i, j;
for(;;) {
for (j = 0; j < LEN; print(i), ++j)
i = j;
for (j = 0; j < LEN; print(i), ++j)
i = LEN-1-j;
}
return 0;
}

Do you like it?

At first I tried to make it be the SICP snake, with the head going down, but it was too hard for me.

>>53
He's quoting >>51.

I know you're mad because mean people have asked you the same. Try not to abuse the quote function and it won't happen again! Easy, right? What are you waiting for? Start using quotes properly! :)