--- /dev/null
+#define gray50_width 16
+#define gray50_height 16
+static unsigned char gray50_bits[] = {
+ 0x55, 0x55, 0xaa, 0xaa, 0x55, 0x55, 0xaa, 0xaa, 0x55, 0x55, 0xaa, 0xaa,
+ 0x55, 0x55, 0xaa, 0xaa, 0x55, 0x55, 0xaa, 0xaa, 0x55, 0x55, 0xaa, 0xaa,
+ 0x55, 0x55, 0xaa, 0xaa, 0x55, 0x55, 0xaa, 0xaa};