Enter multiple variables and let the Pie widget automatically to create a pie and slice widgets for you. You can choose between a circle or a semi-circle, each one will present the data slightly different for you. See the examples below.
You need to be sure that all your variables contains values that are Number type. A text (string) value is not a valid input for the widget and will cause a empty output.
You can set the color of the pie either via the widget's configuration, or you can send a color field in the metadata object of your request.