XXY Oscilloscope
This needs some samples<p><pre><code>  https://dood.al/oscilloscope/#-0.05,-0.8,0,0,0,0,0.0,3,1,sin(a*t-t/5)*cos(a*t/b)*cos((a+b)*t),sin(a*t+(t/11))*cos(t*t/(b*a)),3,5,0,0.74,125,0,0,0

  https://dood.al/oscilloscope/#-0.05,-0.8,1,0,0,0,0.0,3,1,sin(22*a*t-t/15)*cos(a*t+t/12+t/30),sin(a*t+t)*cos(t/a+t/3),2,5,0,0.74,125,0.07,0,0</code></pre>