a pair of hands holding a tube of blood

Prompt 1: a person's hand fills a test tube with red liquid, while another person's hand pours a liquid into a separate test tube. the two hands mix the two substances together, and then the liquid in the test tube begins to change to a dark red color.

Prompt 2: a person mixing two red liquids in a test tube, followed by the person adding a drop of the red liquid to a test tube with a white liquid. then shows the person mixing the two liquids together.