Instructions: Practice drawing straight lines at different orientations.

Materials: Ruler, drawing paper, drawing implements such as pencils, fine-tipped pens or markers, or charcoal.

Keywords: Line, straight, vertical, horizontal, diagonal, freehand, ruler

Step 1: Draw a straight line.

Step 2: Draw a straight horizontal line.

Step 3: Draw a straight vertical line.

Step 4: Draw a straight diagonal line.

Step 5: Draw a straight diagonal line oriented in the opposite direction.

Step 6: Make two small dots.

Step 7: Use a ruler to draw a line to connect the dots.

Step 8: With a fresh piece of paper, draw anything you wish using straight lines only. Use glue, scissors, colored paper, markers, paint, or anything else you desire to create your artwork.

See below a painting made with horizontal and diagonal lines by artist Piet Mondrian, entitled 'View from the Dunes with Beach and Piers.'