createCanvas(100, 100);

  background(220);

  // Approach No. 1

  // Count pixels from 0 up to and including 90

for (let x=0; x <= 90, x+=)

  // Jump 10 pixels at a time

    // Draw a 10-pixel wide column every 10 pixels across

​

  // Approach No. 2

  // Count columns from 0 to, but not including 10

​

    // Calculate the x-position of column-c

​

    // Draw a 10-pixel wide column every 10 pixels across

​

  // rect(0, 0, 10, 100);

  // rect(10, 0, 10, 100);

  // rect(20, 0, 10, 100);

  // rect(30, 0, 10, 100);

  // rect(40, 0, 10, 100);

  // rect(50, 0, 10, 100);

  // rect(60, 0, 10, 100);

  // rect(70, 0, 10, 100);

  // rect(80, 0, 10, 100);

  // rect(90, 0, 10, 100);

}

​

​