Graph showing what changing delta X does in the one dimentional heat equation using the finite difference method

I'm trying to make a two dimensional graph showing what change in delta x does in terms of a one dimensional heat equation using the finite difference method.

My intent is to show that the smaller the delta x is, the more accurate the results will be and the closer they are to the truth. I however, do not know how to go about coding a two dimensional graph showing this property.

[William Rose]

@Aya,

[edit: fix typo]

You wrote "I however, do not know how to go about coding a two dimensional graph showing this property."

What do you mean by "this property"? Please share your code that solves the 1D heat equation, with a value - any value - for delta x. Then one can discuss changing delta x. Thank you.