Piramid of chars - nasm

Hi all,
i have a problem with a program which is doing a pyramid of inputted chars.
for exampled input is 'abc' and output is:
...a
..bbb
ccccc

I'm absolutely new to assembler and everything i have managed to do is:

I don't know how to make this spaces before chars in these strings. I know only that this pyramid's top line should have n-1 (where n is string length) spaces before an char and every next one is (-1). But i don't know assembler's magic loops and i don't even know how to dismember string to chars here.
of course i was googling for this but even if there were codes that could help me they are for fasm or other ide that i dont understand at all

thanks in advance

Code examples aren't going to help you much at the moment. You will need a firmer understanding of assembler and memory first. If you have a text book, it would be helpful to work through the earlier problems and examples.

You could also look at the various subproblems in your current assignment. For instance: Can you write out a string from memory? Can you write out a string from memory one character at a time? Can you write out a character N times? can you create a triangle of characters like:?

When you need help with your code, it is useful to know what it is that you don't understand. Is the question how to construct a loop in assembler? Or is the problem with how to construct the condition?

BTW, to get better search results, try including the keywords "x86" and "intel". There are different flavors of assembler for different chips and x86 assembler is often written in two distinct styles called Intel and AT&T syntax.