Simplify the following text for a Grade 6 native English-speaking person.
Original: There should be a good distance between the bottom of the ladder and the wall so that the ladder is not too vertical , otherwise the ladder might fall backwards and the climber would fall off .
Simplified: In other words , the distance from the foot of the ladder to the wall should be about one quarter of the height of the top of the ladder . At steeper angles , the ladder is at risk of toppling backwards when the climber leans away from it .