The day of the resurrection

Mary Magdalene went to the tomb, where the stone at the entrance was gone.  She thought that someone had stolen the body of Jesus.  Then Peter went to the tomb.  Peter and the other disciple ran to the tomb, but the other disciple did not go into the tomb.  However, Simon Peter went into the tomb.  He saw the head cloth by itself.  Then the other disciple believed.  They still did not understand the resurrection, so that they left the tomb.  Do you understand the resurrection of Jesus?