#include <TimerOne.h>

int buttonState = 0;
int lastButtonState = 0;
int period = 1000;
int sig_out = 9;
int sig_out2 = 10;
int button =2;

void setup() {

  pinMode(button,INPUT_PULLUP);
  pinMode(sig_out, OUTPUT);
  //pinMode(sig_out2, OUTPUT);
  Timer1.initialize(1000);
  Timer1.pwm(sig_out,507,period);
  Serial.print(period);
  //Timer1.pwm(sig_out2,456,900);
}
void loop(){
    buttonState = digitalRead(button);
  if (buttonState != lastButtonState){
     lastButtonState = buttonState;
     if (buttonState == 1){
      period -= 10;
      Timer1.setPeriod(period);
     }
  }
}