#include <Adafruit_NeoPixel.h>

#define PIN_E 6
#define PIN_D 5
#define PINFREIO 12
#define PINSETA 14
#define NUM_LEDS 8
#define CHAVESQU 2
#define CHAVEDIR 3

Adafruit_NeoPixel stripE = Adafruit_NeoPixel(NUM_LEDS, PIN_E, NEO_GRB + NEO_KHZ800);
Adafruit_NeoPixel stripD = Adafruit_NeoPixel(NUM_LEDS, PIN_D, NEO_GRB + NEO_KHZ800);

byte estado=0;

void setup() {
  pinMode(PINFREIO, INPUT_PULLUP);
  pinMode(CHAVESQU, INPUT_PULLUP);
  pinMode(CHAVEDIR, INPUT_PULLUP);
  pinMode(PINSETA, INPUT_PULLUP);
  stripE.begin();
  stripD.begin();
  stripD.setBrightness(180);
  stripE.setBrightness(180);
  apaga();
}

void loop() {
checaestado();
while (digitalRead(PINFREIO)==LOW) freio();
apaga();
}

void apaga(){
  stripD.clear();
  stripE.clear();
  stripD.show();
  stripE.show();
}

void setadir(){
  for (int i = NUM_LEDS; i >= 0; i--) {
    stripD.setPixelColor(i, 255, 255, 0);
    stripD.show();
    delay(100);
  }
  apaga();
}

void setaesq(){
  for (int i = NUM_LEDS; i >= 0; i--) {
    stripE.setPixelColor(i, 255, 255, 0);
    stripE.show();
    delay(100);
  }
  apaga();
}

void piscalerta(){
  /*for (int i = NUM_LEDS; i >= 0; i--) {
    stripE.setPixelColor(i, 255, 255, 0);
    stripD.setPixelColor(i, 255, 255, 0);
  } */ 
  
  for (int i = NUM_LEDS; i >= 0; i--) {
    stripE.setPixelColor(i,0xFFFF00);
    stripD.setPixelColor(i,0xFFFF00);
  }

  stripE.show();
  stripD.show();
  delay(400);
  apaga();
  delay(400);
}

void freio(){
  for (int i = NUM_LEDS; i >= 0; i--) {
    stripE.setPixelColor(i, 255, 0, 0);
    stripD.setPixelColor(i, 255, 0, 0);
  }
  stripE.show();
  stripD.show();
}

void checaestado(){
  while (digitalRead(PINSETA) == LOW) piscalerta();
  while (digitalRead(CHAVESQU) == LOW) setaesq();
  while (digitalRead(CHAVEDIR) == LOW) setadir();
}