#define PINKY   1   // 3
#define RING    0   // 2 
#define MIDDLE  6   // 8
#define INDEX   7   // 9
#define THUMB   10  // 13


int port = INDEX;
int writes;

void setup() {
  // put your setup code here, to run once:
  pinMode(port, OUTPUT);

  Serial.begin(115200);

  Serial.println("Starting");

  auto cp = malloc(1024);
  writes = 0;
}

byte data[1024];      // Taking up memory for this array made no difference.

void loop() {
  Serial.print("writes: "); Serial.println(writes);
  for (int i=0; i<256; i += 2) {
    Serial.print('+');
    analogWrite(port, i);
    writes++;
    delay(5);
  }
  
  Serial.println("");
  Serial.print("writes: "); Serial.println(writes);
  for (int i=254; i>=0; i -= 2) {
    Serial.print('-');
    analogWrite(port, i);
    writes++;
    delay(5);
  }
  Serial.println("");
}