Any room for improvements?

/*--------------
   Quiz app's
Challange rules!
----------------
1. 5 Questions
2.Track of questions
3.Results
4.Ranking
   5   = Gold
   3-4 = Silver
   2-1 = Bronze
   0   = None
--------------*/


var readyCheck;
var yes = "yes";
/* 
Made questions in variables so you can change them manually here
so you dont have to update single variable and look for it       
*/
var question;
var question_1 = 'Is snow white?';
var question_2 = 'Is grass green?';
var question_3 = 'Are bricks orange?';
var question_4 = 'Is water blue?';
var question_5 = 'Is wood brown?';
// Keeps track of the question count
var count = 1;

// qCount = Question + stores the count so it doesnt need to be hardcoded + " : "
var qCount = 'Question ' + count + " : ";
var qCorrect = 0;

// Asks player if he wants to take the quiz!
readyCheck = prompt('Are you ready to take the quiz? Yes or No');
if ( readyCheck.toLowerCase() === yes ){

  alert ('Please answer with yes or no only!');
  /* 
  Questions that will be set on colors depending on the answer
  Count += 1 adds up so i dont have to hard code the questions number in myself
  qCorrect sums up for checking how many questions have been answered correctly
  Places result in color green = correct, red = incorrect
  */

  // question 1
  question = prompt(qCount + question_1);
  // Checks if the answer is correct or not
  if ( question === yes.toLowerCase() ) {
    qCorrect += 1;
    document.write('<p  style="color:green;">Question ' + count + ' answer was : ' + question + '</p>');
  } else { document.write('<p  style="color:red;">Question ' + count + ' answer was : ' + question + '</p>'); }

  // question 2  
  count += 1;
  question = prompt(qCount + question_2);
  // Checks if the answer is correct or not  
  if ( question === yes.toLowerCase() ) {
    qCorrect += 1;
    document.write('<p  style="color:green;">Question ' + count + ' answer was : ' + question + '</p>');
  } else { document.write('<p  style="color:red;">Question ' + count + ' answer was : ' + question + '</p>'); }

  // question 3
  count += 1;
  question = prompt(qCount + question_3);
  // Checks if the answer is correct or not  
  if ( question === yes.toLowerCase() ) {
    qCorrect += 1;
    document.write('<p  style="color:green;">Question ' + count + ' answer was : ' + question + '</p>');
  } else { document.write('<p  style="color:red;">Question ' + count + ' answer was : ' + question + '</p>'); }

  // question 4
  count += 1;
  question = prompt(qCount + question_4);
  // Checks if the answer is correct or not  
  if ( question === yes.toLowerCase() ) {
    qCorrect += 1;
    document.write('<p  style="color:green;">Question ' + count + ' answer was : ' + question + '</p>');
  } else { document.write('<p  style="color:red;">Question ' + count + ' answer was : ' + question + '</p>'); }

  // question 5
  count += 1;
  question = prompt(qCount + question_5);
  // Checks if the answer is correct or not  
  if ( question === yes.toLowerCase() ) {
    qCorrect += 1;
    document.write('<p  style="color:green;">Question ' + count + ' answer was : ' + question + '</p>');
  } else { document.write('<p  style="color:red;">Question ' + count + ' answer was : ' + question + '</p>'); }

  // This will display what reward you got
  alert ('Lets see what medal you got!');
  if ( qCorrect === 5 ){
     document.write('<b><p style="color:#FFD700;"> You know all the colors! You\'ve got gold medal!</p></b>') 
  }
  else if ( qCorrect === 4 || qCorrect === 3){
     document.write('<b><p style="color:#C0C0C0;"> You know colors well! You\'ve got silver medal!</p></b>') 
  }
  else if ( qCorrect === 2 || qCorrect === 1){
     document.write('<b><p style="color:#CD7F32;"> You know atleast some colors! You\'ve got Bronze medal!</p></b>') 
  }
  else if ( qCorrect === 0 ){
     document.write('<b><p>You dont know colors at all!</p></b>') 
  }
} else { alert('Feel free to do it any other time!')}