$img = Image::canvas($size * 2 + 60, $size + 26);
$radius = $size + 20;
$fits = ($to - $from) / $step;
$deg = 180 / $fits;
$center = [$img->width() / 2, $size + 19];
for ($t = $from, $i = $fits; $t <= $to; $t += $step, $i--) {
    $rad = deg2rad($deg * $i);
    $x = $center[0] + $radius * cos($rad);
    $y = $center[1] - $radius * sin($rad);
    if($i == 0 || $i == $fits)
        $y -= 6;
    if($i == 0)
        $x -= 2;
    if($i == $fits)
        $x += 2;
    $img->text($t, $x, $y, $this->font);
}
return $img;