var speed = 50
        // Prime the result output
        for (col of [rin, bin, gin]) {
          rin.valueAsNumber = 0
          bin.valueAsNumber = 0
          gin.valueAsNumber = 0
        }
        rin.dispatchEvent(new Event('change'));

        async function tryit(col, incr) {
          // Increment a single color
          col.valueAsNumber = col.valueAsNumber + incr
          col.dispatchEvent(new Event('change'));
          submit.click()
          await (new Promise(resolve => setTimeout(resolve, speed)));
          var res_text = result.innerText.split(/[ ()%]/)[4]
          if (res_text === "Splendid!") {
            throw new Error("Finished")
          }
          return (parseInt(res_text))
        }

        async function trymany() {
          // We need to iterate at least twice due to rounding
          // in result percentage, sometimes making neighbouring 
          // colors have the same result. 
          var last_res = 0, max_tries = 3;
          while (--max_tries > 0) {
            for (col of [rin, gin, bin]) {
              while (true) {
                var new_res = await tryit(col, 1)
                if (last_res >= new_res) {
                  // set last value and break
                  await tryit(col, -1)
                  break
                }
                last_res = new_res
              }
            }
          }
        }
        await trymany()