Drawing as cognitive training - horizontal line

How to draw a straight horizontal line
Stage 1

Take an A4 sheet paper and an HB pencil.
Use the paper as landscape layout
On the top part of the paper put three dots across the sheet. i.e. one at the top left, another in the middle and the last one at the top right.
Keep the pencil at the first dot, look at the middle dot and draw the line without looking at pencil tip. The line drawn will be straight. Repeat the exercise from the middle point to the last one.
Repeat the exercise for five minutes from left to right and right to left.
Stage 2

Repeat the exercise putting the pencil tip at first point and looking at the last point.
The long line drawn will be passing through the middle point and the line drawn will be straight.
Repeat the exercise for three minutes.
Stage 3

Draw a straight line across the sheet without marking any point. The line drawn will be a long straight line.