how to sperate a mixture that contain , instant coffee , glitter , and flour

First, leave the strip club. Glitter gets every where.

/joke

Think about the size of the various ingredients and if that might help you some how. Like if you had a coffee can of nickels, dimes and quarters. How would you separate them?

The glitter has magnetic properties (I assume) - magnetism will attract it.
I also assume mixture is dry.

What form is the instant coffee - Fine powder? Granular?
Is the flour ground?
Do you require both flour and coffee separated dryly?
Do you have a 'speaker' to spare?
Vibrating at different frequencies or in a centrifuge will seperate different materials.

If the glitters are in bigger size they can be separated but if the glitters are small than it is not possible to separate and the flour and coffee powder can not be separated so I think that there is no solution of your problem.