How do you plan to solve it?
First I make sure the wiring to andruino is correct and i put the code to run the simulation

/*Paste your code here*/
// ledblink
int ledPin = 13;
void setup() {
pinMode(ledPin, OUTPUT);
}
void loop() {
digitalWrite(ledPin, HIGH);
delay(400);
digitalWrite(ledPin, LOW);
delay(800);
}
Add video of the output (know more)
Add a photo of your hardware showing the output.