int leftCCW[] = {8, 9, 10, 11};
int leftCW[] = {11, 10, 9, 8};
int leftButtons[] = {2, 3};

int rightCCW[] = {4, 5, 6, 7};
int rightCW[] = {7, 6, 5, 4};
int rightButtons[] = {0, 1};

const int motorSteps[8][4] = {
{1, 0, 0, 0},
{1, 1, 0, 0},
{0, 1, 0, 0},
{0, 1, 1, 0},
{0, 0, 0, 1},
{0, 0, 1, 1},
{0, 0, 0, 1},
{1, 0, 0, 1}
};

int motorSpeed = 0;

void setup() {
  for (int i=0; i < 4; i++) {
    pinMode(leftCW[i], OUTPUT);
    pinMode(rightCW[i], OUTPUT);
  }
  for (int i = 0; i < 2; i++) {
    pinMode(leftButtons[i], INPUT);
    pinMode(rightButtons[i], INPUT);
  }
}

void loop() {
  if (analogRead(leftButtons[0]) == 0) {
    leftUp();
  } else if(analogRead(leftButtons[1]) == 1){
    leftDown();
  }

  if (analogRead(leftButtons[0]) == 0) {
    rightUp();
  } else if(analogRead(leftButtons[1]) == 1){
    rightDown();
  }
}

void leftUp() {
  for(int i=0; i < 8; i++){
    for(int j=0; j < 4; j++){
      // Left motor
      digitalWrite(leftCW[j], motorSteps[j][i]);
      delay(1);
    }
  }
}

void leftDown() {
  for(int i=0; i < 8; i++){
    for(int j=0; j < 4; j++){
      // Left motor
      digitalWrite(leftCCW[j], motorSteps[j][i]);
      delay(1);
    }
  }
}

void rightUp() {
  for(int i=0; i < 8; i++){
    for(int j=0; j < 4; j++){
      // Right motor
      digitalWrite(rightCCW[j], motorSteps[j][i]);
      delay(1);
    }
  } 
}

void rightDown() {
  for(int i=0; i < 8; i++){
    for(int j=0; j < 4; j++){
      // Right motor
      digitalWrite(rightCW[j], motorSteps[j][i]);
      delay(1);
    }
  }
}