Final answer:
The question involves creating a grid of randomly positioned white dots on a black dot grid with white dot sizes varying based on the distance from the grid's center, using programming techniques such as randomization and size calculation functions.
Step-by-step explanation:
The student's question appears to pertain to a programming assignment involving visual effects, where the program must create a grid of black dots with randomly positioned white dots on top, and the size of the white dots varies according to their distance from the center. The code requirements suggest the use of a rand function to generate random positions and possibly a calculation method to determine the size of the white dots based on their proximity to the center.
To achieve the basic visual effect, randomization must be implemented to place white dots on a black dot grid. This seemingly involves using a provided function (potentially named 'randsen') which generates random numbers within a specified range. For the advanced visual effects, the student needs to complete a function responsible for calculating the size of the white dots, such that they become larger the closer they are to the center of the grid.
Note that the function names and specific implementation details, such as input parameters or returned values, appear to be omitted or obscured due to typos in the provided text.