LED THRESHHOLD FREQUENCY

int ledpin=8;
int threshold_value=400;



void setup() {
  Serial.begin(9600);
  pinMode(ledpin,OUTPUT);
  pinMode(buttonpin,OUTPUT);
  // put your setup code here, to run once:

}

void loop() {
 int sensorvalue=analogRead(A0);
 Serial.println(sensorvalue);
 if(sensorvalue>threshold_value)
 digitalWrite(ledpin,HIGH);
 delay(200);
 digitalWrite(ledpin,LOW);

 
 }
  // put your main code here, to run repeatedly: