diff --git a/fw/HackSpaceCon/src/main.cpp b/fw/HackSpaceCon/src/main.cpp
index b552980..be526d0 100644
--- a/fw/HackSpaceCon/src/main.cpp
+++ b/fw/HackSpaceCon/src/main.cpp
@@ -56,6 +56,11 @@ enum {
 	RGB_PROG_BTN_RELEASE
 };
 
+enum {
+	PROG_RUN = 0,
+	PROG_INIT = 1
+};
+
 uint8_t run_rgb_program = 0;
 
 
@@ -106,7 +111,7 @@ void loop() {
 			digitalWrite(PIN_PA6, HIGH);		// enable LED power supply,
 			delay(10);							// wait a moment for LEDs to stabilize,
 
-			rgb_program[0](1);					// initialize the program,
+			rgb_program[0](PROG_INIT);			// initialize the program,
 			run_rgb_program++;					// and set to running mode.
 
 			enable_rgb_timer();					// then start the RGB program timebase.
@@ -117,13 +122,10 @@ void loop() {
 		}
 
 		case RGB_PROG_RUNNING: {				// continuing to run a program
-			// send updates to the led
-			rgb.show();
+			rgb.show();							// send updates to the led
 
-			// then process the next program frame
-			if (!rgb_program[0](0)) {
-				// until the program says it's done
-				run_rgb_program = RGB_PROG_IDLE;
+			if (!rgb_program[0](PROG_RUN)) {	// then process the next program frame
+				run_rgb_program = RGB_PROG_IDLE;// until the program says it's done
 				break;
 			}
 
@@ -133,8 +135,7 @@ void loop() {
 		}
 
 		case RGB_PROG_BTN_RELEASE: {			// button released wakes MCU, but we're still running a program
-			// skip processing and go back to stage 2
-			run_rgb_program = RGB_PROG_RUNNING;
+			run_rgb_program = RGB_PROG_RUNNING;	// so skip processing this cycle and go back to stage 2
 
 			idle_cpu();							// we can idle the CPU after doing nothing
 			
@@ -146,8 +147,7 @@ void loop() {
 			digitalWrite(PIN_PA6, LOW);			// disable LED power supply,
 			run_rgb_program = RGB_PROG_IDLE;	// and clear run_rgb_program.
 
-			// finally, go to sleep in standby mode
-			sleep_cpu();
+			sleep_cpu();						// finally, go to sleep in standby mode
 
 			break;
 		}