Easter Egg

function solve (n) {
  let egg = [];
  let width = 5 * n;
  let height = 2 * n + 3;
  // mid row
  let mid = '.'.repeat(n/2) + '**' + '~'.repeat((width - n - 16)/2) + 'HAPPY EASTER' + '~'.repeat((width - n - 16)/2) + '**' + '.'.repeat(n/2);
  egg.push(mid);
  // ==== sections
  let eqSection = [];
  for (let i = 1; i <= n/2; i++) {
    let line = '.'.repeat(n-i) + '**' + '='.repeat(width - (n - i)*2 - 4) + '**' + '.'.repeat(n-i);
    eqSection.push(line);
  }
  // +++ section
  let plusSection = [];
  for (let i = 1; i <= n/2; i++) {
    let line = '.'.repeat(2 * (n - i)) + '*'.repeat(i) + '+'.repeat(n + 2 * i) + '*'.repeat(i) + '.'.repeat(2 * (n - i));
    plusSection.push(line);
  }
  // top line
  let topline = '.'.repeat(2 * n) + '*'.repeat(n) + '.'.repeat(2 * n);
  let revEq = eqSection.reverse();
  let revPlus = plusSection.reverse();
  egg.unshift(topline, ...plusSection, ...eqSection);
  egg.push(...revEq, ...revPlus, topline);

  console.log(egg.join('\n'))
}