Press Play to start/stop. Press D while hovering over a note to delete that note. Use the sliders to change instrument and tempo. I am aware this is extremely buggy, and I will fix it soon.
OnlineSequencer.net for the notes. I used @griffpatch's snap-to-grid script and modified it to the height/width of the notes. Update Log: 3/23/19 v1.0: Shared 3/24/19 v1.1: Added Slider 4/9/19 v1.2: Added multiple instrument reading Upcoming Changes: -Load/Save function -MIDI -Scrolling CREDITS: @-Rex- for PTE Lite+ @griffpatch for the snap-to-grid tutorial Updates to be added today: