//Connect Eight LEDs to port E bit 0 to bit 7. Glow LEDs of bit5, bit4, bit3, bit1

#include <stdint.h>

#define eport (*(volatile uint8_t*)0x2E)
#define eddr  (*(volatile uint8_t*)0x2D)

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

void setup() {
  eddr = 0xFF;
}

void loop() {
  eport = 0x3A;
  delayy();
  eport = 0x00;
  delayy();
}