Numbered repetition of instructions

A visual artist is programming an 8x8 LED display:

This is their program so far:

rowNum ←  0
REPEAT 5 TIMES
{
   colNum ← 0
   REPEAT (5 - rowNum) TIMES
   {
     fillPixel(rowNum, colNum, "red")
     colNum ← colNum + 1
    }
    rowNum ← rowNum + 1
}

The code relies on this procedure:

fillPixel(row, column, color) : Lights up the pixel at the given row and column with the given color (specified as a string). The top row is row 0 and the left-most column is column 0.

What will the output of their program look like?

🤔

This code is written in pseudocode. You can't actually run pseudocode, but we use it for planning programs and for thinking about code independently of specific programming language.

AP CSP exam questions use pseudocode, so it's helpful to become familiar with it.

Here is a reference for the pseudocode used here:

REPEAT n TIMES
{
   <instructions>
}

Executes the code in <instructions> repeatedly, n times.

a ← expression

Evaluates expression and assigns the result to the variable a.

**Arithmetic operators**
Operator	Meaning
`a + b`	Evaluates to the result of `b` added to `a`
`a - b`	Evaluates to the result of `b` subtracted from `a`
`a * b`	Evaluates to the result of `a` multiplied by `b`
`a / b`	Evaluates to the result of `a` divided by `b`

AP®︎/College Computer Science Principles

Course: AP®︎/College Computer Science Principles > Unit 3

Problem