Example

function scale($strokeColor, $fillColor, $backgroundColor, $fillModifiedColor)
{
    $draw = new \ImagickDraw();
    $draw->setStrokeColor($strokeColor);
    $draw->setStrokeWidth(4);
    $draw->setFillColor($fillColor);
    $draw->rectangle(200, 200, 300, 300);
    $draw->setFillColor($fillModifiedColor);
    $draw->scale(1.4, 1.4);
    $draw->rectangle(200, 200, 300, 300);

    $image = new \Imagick();
    $image->newImage(500, 500, $backgroundColor);
    $image->setImageFormat("png");
    $image->drawImage($draw);

    header("Content-Type: image/png");
    echo $image->getImageBlob();
}