.... - & its Eraser won't help because it just leaves 'Weird Checkered Trace'? 

*Just click 'Undo' - & the last Element of your drawing will Disappear! 😁👍⤵

🔷 And if you click it again - the Previous element of the Drawing will disappear as well :)

*Note to Self:

- While using Sketchpad - use 'Undo' - not 'Eraser'