Mental Simulation: From Pedal to Rear Wheel

Simulation target: a bicycle's drivetrain. The process from the force of one full turn of your pedal until it turns the rear wheel. Don't look anything up — run it using only the mental image you have right now.

Close your eyes and build an image of the bicycle seen from the side, then slowly turn the pedal one full rotation. Describe, step by step with numbers, which parts the force passes through and how it is transmitted, and which direction each part moves. Then, at the very end, you MUST report the 'point where the image went blurry' — where in some part or connection the picture got hazy or you skipped ahead without realizing — honestly in one or two sentences.