Make a code webGL with html & JS for below questions $($there are 'initShaders.js; 'webgl$-$utils.js$\text{'})!$

a$.$ In the shadow program, make the object move and the shadow follows the object with a fixed light direction $($not moving$)?$

b$.$ In the shadow program, make the light move using a button so that the shadow follows the direction of the light's movement?