function addDiv(number) {
  for(var j = 0; j < number; j++){
    var parentDiv = document.querySelector('#top-div')
    var newContainerDiv = document.createElement('div')
    for (var i = 0; i < number; i++) {
      var newDiv = document.createElement('div')
      var newParagraph = document.createElement('p')
      newParagraph.textContent = 'Happy Holidays'
      newDiv.setAttribute("class","green")
      newDiv.appendChild(newParagraph)
      newContainerDiv.appendChild(newDiv)
    }
    parentDiv.appendChild(newContainerDiv)
  }
}

function addSquares(number) {
  for(let i=1; i <= number; i++) {
    let divSquare = document.createElement("div")
    if (i % 2 == 0) {
      divSquare.setAttribute('class', 'square green')
    } else {
      divSquare.setAttribute('class', 'square red')
    }
    divSquare.innerText = 'Merry Christmas'
    document.querySelector('#top-div').appendChild(divSquare)
  }
}

addDiv(10)

addSquares(51);