Enter a formula in the text field at the bottom. The formula should involve
the names of faces from the images (parent bank) to the right.
The formula should end with a
";". Examples of formulas are ru + 0.3 hiro + 2shikami;
or koomote shikami +.2 li;. Pressing enter will
generate a new face that mixes the "genetic material" of the involved
parents according to the formula. the result is shown in the central
pane.