Implement very bad state machine to match a subset of ANSI escape codes.

kern/init.c

@@ -38,6 +38,14 @@ i386_init(void)
 	// Test the stack backtrace function (lab 1 only)
 	test_backtrace(5);
 
+	// Test ANSI color escape codes
+	cprintf("\33[31m" "C"
+		"\33[33m" "o"
+		"\33[32m" "l"
+		"\33[36m" "o"
+		"\33[34m" "r"
+		"\33[0m"  " Works!" "\n");
+
 	// Drop into the kernel monitor.
 	while (1)
 		monitor(NULL);