How to make a four-pointed origami star

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17.

Emphasize exsisting creases.

Prepare to press the model down on the side.

You can directly apply a "square-fold" from the step #16 instead.

18.

Press down the model on the side.

It is the "bird base" .

You can also fold this bird base by conventional folding method.

Prepare for two "valley-folds" .