The Typical diagram of a standing wave

[Misr]

[quote name = "Physicsclassroom.com]

Because antinodes are vibrating back and forth between a large positive and large negative displacement, a diagram of a standing wave is sometimes depicted by drawing the shape of the medium at an instant in time and at an instant one-half vibrational cycle later. This is done in the diagram below.

This isn't clear for me :(

 

[only1universe]

This isn't clear for me :(

They're showing you the same wave at 2 different times.

 

[Drakkith]

I THINK the top wave (the one that starts on the left and goes upwards first) is half a cycle out of phase with the bottom wave.(starts on left and goes down first) If we remove the bottom wave completely, and slide the whole wave left until the point that the top wave hits the middle line on the way down is on the left side, then now the wave looks just like the bottom wave. The top and bottom wave are both the same wave, just drawn out of phase and together.

 

[Misr]

Yeah,I got it now
Thanks