What is ctx.fill

Question

IMA trying to learn and understand the matrix code, but what does the CTX.fill mean
https://code.sololearn.com/W7Z68RytP9z1/?ref=app

Answer 1

In this code ctx is a defined variable:
var ctx = c.getContext("2d");
this variable contains an object and fill... are the methods on this objects:
ctx.fillRect, ctx.fillStyle, etc.

Answer 2

nice, thanks, what part of the code makes it drop????

Answer 3

It actually doesn't drop, it adds new characters above and changes the colour of the previous one. Analyse the draw() function.

Answer 4

nice