I made this for @codepony. Pretty useless if you don't know what it is useful for.

curtain.c

#include <stdio.h>
#include <string.h>

void reverse(char* s)
{
	int i, j;
	char c;
	for (i = 0, j = strlen(s) - 1; i < j; i++, j--)
	{
		c = s[i];
		s[i] = s[j];
		s[j] = c;
	}
}

int main(int argc, char** argv)
{
	if (argc != 2) {
		printf("Usage: %s TEXT\n", argv[0]);
		return 1;
	}
	int i, j = strlen(argv[1]);
	int a[j];

	reverse(argv[1]);

  printf("[");
	for (i = 0; i < j; i++) {
		a[i] = 0xFF - argv[1][i];
		printf("%d, ", a[i]);
	}
	printf("\b\b]\n");

	return 0;
}