3 files changed, 39 insertions, 28 deletions
diff --git a/Makefile b/Makefile
index 8df710b..a3d43ac 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 
 default:
 	# compile for attiny86 with warnings, optimizations, and 1 MHz clock frequency
-	avr-gcc -Wall -Os -DF_CPU=1000000 -mmcu=attiny85 -o hello.o hello.c
+	avr-gcc -Wall -Os -DF_CPU=1048576 -mmcu=attiny85 -o hello.o hello.c
 	avr-objcopy -j .text -j .data -O ihex hello.o hello.hex
 	avrdude -c usbasp -p t85 -U flash:w:hello.hex:i
 
diff --git a/hello.c b/hello.c
index 2d1ba75..e475624 100644
--- a/hello.c
+++ b/hello.c
@@ -1,32 +1,35 @@
+
 #include <avr/io.h>
-// F_CPU frequency to be defined at command line
 #include <util/delay.h>
 
-// LED is on pin 2, PB3
-#define LED      PB3
-#define DELAY_MS 500
-
-int main () {
-	uint8_t high = 0;
-	uint16_t ms = 0;
-
-	DDRB |= (1 << LED);
-	PORTB &= ~(1 << LED);
+int
+main (void)
+{
+	DDRB |= _BV(DDB0);
+	DDRB |= _BV(DDB1);
+	DDRB |= _BV(DDB2);
+	DDRB |= _BV(DDB3);
+	DDRB |= _BV(DDB4);
+	while(1) {
+		PORTB ^= _BV(PB0);
+		_delay_ms(500);
+		PORTB ^= _BV(PB0);
 
-	while (1) {	
-		high = !high;
+		PORTB ^= _BV(PB1);
+		_delay_ms(500);
+		PORTB ^= _BV(PB1);
 
-		if (high) {
-			PORTB |= (1 << LED);
-		} else {
-			PORTB &= ~(1 << LED);
-		}
+		PORTB ^= _BV(PB2);
+		_delay_ms(500);
+		PORTB ^= _BV(PB2);
 
-		for (ms = DELAY_MS; ms > 0; ms -= 10) {
-			_delay_ms(10);
-		}
-	}
+		PORTB ^= _BV(PB3);
+		_delay_ms(500);
+		PORTB ^= _BV(PB3);
 
-	return 0;
+		PORTB ^= _BV(PB4);
+		_delay_ms(500);
+		PORTB ^= _BV(PB4);
+        }
 }
 
diff --git a/hello.hex b/hello.hex
index 9f6b12f..c30d990 100644
--- a/hello.hex
+++ b/hello.hex
@@ -1,7 +1,15 @@
 :100000000EC015C014C013C012C011C010C00FC064
 :100010000EC00DC00CC00BC00AC009C008C011241E
-:100020001FBECFE5D2E0DEBFCDBF02D016C0E8CF05
-:10003000BB9AC39880E091E0892711F0C39A01C070
-:10004000C39822E330E0E3ECF9E03197F1F700C028
-:0E005000000021503109B9F7EFCFF894FFCF2F
+:100020001FBECFE5D2E0DEBFCDBF02D052C0E8CFC9
+:10003000B89AB99ABA9ABB9ABC9A51E042E034E0B5
+:1000400028E090E188B3852788BB69E979E981E0F8
+:10005000615070408040E1F7000088B3852788BB7D
+:1000600088B3842788BB69E979E981E061507040F1
+:100070008040E1F7000088B3842788BB88B38327DA
+:1000800088BB69E979E981E0615070408040E1F71F
+:10009000000088B3832788BB88B3822788BB69E9BF
+:1000A00079E981E0615070408040E1F7000088B359
+:1000B000822788BB88B3892788BB69E979E981E011
+:1000C000615070408040E1F7000088B3892788BB09
+:0600D000B9CFF894FFCF48
 :00000001FF