//Connect Eight LEDs to port L bit 0 to bit 7. Glow all EVEN position LEDs

#include <stdint.h>

#define lport (*(volatile uint8_t*)0x10B)
#define lddr  (*(volatile uint8_t*)0x10A)

void delayy(void){
  volatile uint32_t i;
  for(i = 0; i < 100000; i++);
}

void setup() {
  lddr = 0xFF;
}

void loop() {
  lport = 0x55;
  delayy();
  lport = 0x00;
  delayy();
}