const int buttonPin = 7;

const int ledPin = 13;
int myDelay=200;
int bGiallo=8;
int bViola=9;
int ultimostatob=0;
 int buttonValue = 0;
int statoLed=LOW;

void setup() {
 pinMode(buttonPin, INPUT);
 pinMode(ledPin, OUTPUT);
 
Serial.begin(9600);
}

void loop() {
if(digitalRead(bGiallo)==HIGH){myDelay++;}
if(digitalRead(bViola)==HIGH){myDelay--;}
buttonValue = digitalRead(buttonPin);
Serial.println(buttonValue);
Serial.print("delay=");
Serial.println(myDelay);
delay(myDelay);
if(buttonValue != ultimostatob){
  if( buttonValue== HIGH)
  statoLed=!statoLed;
   
}
  digitalWrite(ledPin,statoLed);
  ultimostatob=buttonValue;


}