LESS mixin to get random from array

randomFromArray.less

@blue: #009be1;
@green: #64c200;
@red: #ff1842;
@orange: #ffbf00;
@yellow: #ffd400;

@colors: '@{green}','@{blue}','@{red}','@{orange}','@{yellow}';

.randomFromArray(@min: 1, @max: length(@colors), @int: 0) {
  @getNum: `Math.random() * (@{max} - @{min} + @{int})`;
  @base: unit(`@{int} == 1 ? Math.floor(@{getNum}) : @{getNum}`);
  @randNum: floor( @base + @min );
  @color: e( extract(@colors, @randNum) );
}

// USE
body {
  .randomFromArray();
  background-color: @color;
}

@geometry dash meltdown I can't find any errors.