<?php

$colourChoice = rand(0, 9);

switch ($colourChoice){
    case '0':
        $colour = 'white';
        break;
    case '1':
        $colour = '';
        break;
    case '2':
        $colour = '';
        break;
    case '3'
        $colour = '';
        break;
    case '4':
        $colour = '';
        break;
    case '5':
        $colour = '';
        break;
    case '6':
        $colour = '';
        break;
    case '7':
        $colour = '';
        break;
    case '8':
        $colour = '';
        break;
    case '9':
        $colour = '';
        break;
}

?>