So, here we go:
And, the rise of solid state laser pointers makes this sort of exercise so much easier, BUT YOU MUST BE CAREFUL NOT TO GET SUCH A BRIGHT SOURCE INTO YOUR EYE AS THIS MAY CAUSE RETINAL BURNS THUS BLIND SPOTS. (I recall, buying and assembling a kit He-Ne laser to have this exercise for my High School students. We had a ball, using metre sticks stuck to a screen with blu-tack, to observe and measure effects from several metres away.)
So, now, what about, electrons:
Notice, the pattern here builds up statistically, one spot at a time.
Then, HT BA77 way back, here is Dr Quantum:
Now, if you think you have it all figured out, think again, and again, and again. KF