Final answer:
Nested loops are used to draw a grid of 50x50 pixel squares at specific positions within a 10,000x10,000 pixel window, creating a pattern of squares spaced 1000 pixels vertically and 2000 pixels horizontally apart.
Step-by-step explanation:
The question is about creating a pattern of squares within a graphical window using nested loops in a programming language, which falls under Computer Graphics.
We have a window of size 10,000x10,000 pixels. The outer loop runs from i = 1000 to i < 8000, incrementing by 1000 each time. This means that the loop runs for 7 iterations (starting from 1000, 2000, ..., to 7000). The inner loop runs from k = 2000 to k < 10000, incrementing by 2000 each time. This means it runs for a total of 4 iterations (starting from 2000, 4000, ..., to 8000).
For each combination of i and k, a rectangle (or square in this case) with dimensions of 50x50 pixels is drawn. This results in a grid of squares starting at pixel position (2000, 1000) and ending at pixel position (8000, 7000), with squares placed 1000 pixels apart vertically and 2000 pixels apart horizontally.