int led = 10;
void setup()
{
  Serial.begin(9600);
  pinMode(led,OUTPUT);
}
void loop()
{
 int x,y;
 x = analogRead(A0);
 y = map(x,0,1023,0,255);
 Serial.print("x = ");Serial.println(x);
 Serial.print("y = ");Serial.println(y);
 analogWrite(led,y);
}
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