You will be making a line through the middle of the X, where the diagonals cross. This last fold is used to divide an area into two equal parts. You have made a little tent. To help your visualization skills, undo this step and imagine in 'your mind's eye' the sides coming in to form a flat arrowhead. Flip the model over.
People can make gestures here.
The legs of the frog are out. You need to fold them up. This is not an exact fold but what origami folders call 'to taste'. 5. The frog is too fat. Make the frog thinner by folding in the sides.