Minor program improvements

src/programs/misc.c

@@ -0,0 +1,31 @@
+// Miscellaneous small programs
+
+#include "../libc/stdio.h"
+
+// Print a rainbow colorful text for testing
+
+#define BUF_SIZE 256
+#define COLORS 20
+
+void program_rainbow()
+{
+	char input_buffer[BUF_SIZE];
+	puts("What to print? ");
+	get_input(input_buffer, BUF_SIZE);	
+	puts("\n");
+
+	for (int i=0; i<COLORS; i++)
+	{
+		colorputs(input_buffer, i);
+		puts("\n");
+	}	
+}
+
+// Clear the terminal
+
+#define ROWS 25
+
+void program_clear()
+{	
+	for (int i=0; i<ROWS; i++) scroll(1);
+}

src/programs/primes.c

@@ -1,5 +1,6 @@
 #include "../libc/stdint.h"
 #include "../libc/stdio.h"
+#include "../kernel/system.h"
 
 #define PRIMES_MAX 1000000
 
@@ -16,8 +17,9 @@ void program_primes()
 	{	
 		if (isPrime(x))
 		{
-				printf("%d ", x);
+				printf("%d ", x);	
 		}
+		delay(2);
 	}
 	puts("\n");
 }

src/programs/programs.h

@@ -4,4 +4,7 @@
 void program_words();
 void program_primes();
 
+// Misc
+void program_rainbow();
+void program_clear();
 #endif