C program to bounce an asterisk across the screen

bounce.c

#include <stdio.h>
#include <string.h> /* for memset() */
#include <unistd.h> /* for usleep() */

#define MAXLEN 80

int main(void) {

	int		spaces = 0,
			iterator = 1;

	char	buffer[MAXLEN];
	
	while( 1 ) {
	
		/* fill buffer with spaces */
		memset( buffer, 0, MAXLEN );
		memset( buffer, ' ', spaces );
		
		/* add the bouncing asterisk where it belongs */
		buffer[spaces] = '*';
		
		/* move to the next spot */
		spaces += iterator;
		
		/* check to make sure we're onscreen. If we're headed off, bounce the other way */
		if( spaces == MAXLEN ) {
		iterator = -1;
		}
		else if( spaces == 0 ) {
		iterator = 1;
		}
		
		/* output: clear screen with VT100 escape, then print buffer */
		printf("\33[2K\r");
		printf("%s", buffer);
		
		/* pause for 10000 microseconds */
		usleep( 10000 );
	}
	
	return 0;
}