#include <SoftwareSerial.h>

SoftwareSerial mySerial(1, 0);

const int ledPin = 7;
const int buttonPin = 10;
const int potPin = A1;

int urca = 0;

bool safe = false;

void setup() {
  
  CLKPR = (1 << CLKPCE);
  CLKPR = (0 << CLKPS3) | (0 << CLKPS2) | (0 << CLKPS1) | (0 << CLKPS0);
pinMode (buttonPin, INPUT);
pinMode (potPin, INPUT);
digitalWrite(buttonPin, LOW);
 mySerial.begin(9600);

}

void loop()
{
  if (digitalRead(buttonPin) == HIGH) {
    safe = !safe;
    mySerial.write(map(analogRead(potPin), 0, 1023, 0, 255));            
    digitalWrite(ledPin, safe); 
    delay (50);  
  }
  else {

  mySerial.write(urca);
digitalWrite(ledPin, safe); 
}
}