Step 1. Start with a piece of paper white side up. Then fold the paper in half diagonally both ways, and unfold.Step 2. Fold the paper in half vertically and horizontally, then unfold.Step. 3 Using existing creases, fold the paper in half andStep 4. Collapse in progress.Step 5.Finished Preliminary base!Step 1. Start with a piece of paper white side up. Then fold the paper in half diagonally, then vertically and horizontally. unfold.Step 2. Holding the bottom tip down, fold the remaining three to the center, performing a collapse.Step 3. Collapse in progress.Step 4. End of collapse.Step 5. Fold the sides to the center, making sure that the sides you fold, have the four tips at the bottom.Step 6. Unfold the sides you just folded, and pull them up to the top. Make sure you don’t tear the paper.Finished preliminary base! Repeat steps 5-6 on the back to continue for the crane.