In the video, a person is seen using a ruler and a pen to draw lines on a piece of cardboard. The person is measuring and marking the cardboard with precision, ensuring that the lines are straight and even. The ruler is used to measure the length of the lines, and the pen is used to draw the lines on the cardboard. The person's hands are steady as they work, and they appear to be experienced in this task. The cardboard is a light brown color, and the ruler is silver with black markings. The pen is black with a fine tip, which allows for precise marking. The video is shot from a top-down perspective, giving a clear view of the person's hands and the cardboard.