how to loop a script in js code example

Example 1: javascript for loop

var colors=["red","blue","green"];
for (let i = 0; i < colors.length; i++) { 
  console.log(colors[i]);
}

Example 2: for loop

// Unity for loop coroutine (repeat something every x seconds for x time)

Coroutine doThisCoroutine; // (Create a coroutine for stopping)
int duration = 5 // (Duration, whatever you want it to be)
float waitTime = 1 // Wait time to iterate in seconds, usually 1

void Awake(){
  
  DoThisCoroutine = StartCoroutine(DoThis()); // Start the coroutine
    
}
    
IEnumerator DoThis(){
  
  while (enabled){ // While the behavior is enabled,
  
    for (int x = 0; x < Duration; x++){ // From zero until 5 incrementing by 1...
    
      print("Doing This!"); // Do whatever...
  	
      yield return new WaitForSeconds(waitTime) // Every second.
  
  	}
  
  }

}