{
let doodle = cssdoodle`
:doodle {
@grid: ${grid} / 600px;
@max-size: calc(${width} * 1px);
}
background-color: #000;
background-repeat: no-repeat;
background-blend-mode: difference;
background-position: @r(100%) @r(100%);
background-size: @m20(@r(100%) @lr);
background-image: @m20(linear-gradient(#fff, #fff));
`;
doodle.addEventListener('click', e => doodle.update());
return doodle;
}