4 wooden panels 115cm x 115cm x 9mm are 28kg
4 dry wall panels 115cm x 115cm x 10mm are 40kg
wooden cubes are approx 40kg
wooden frame is approx 16kg
you need to add 1kg of screws and paint
The total weight is about 120kg.
We can assume that
Each 28cm cube could be filled with 5kg for a total of 5x12kg = 60kg
Each 20cm cube could be filled with 3kg for a total of 3x12kg = 36kg
Each 16cm cube could be filled with 1kg for a total of 1x12kg = 12kg
The total weight of the entire structure is 28+40+40+16+1+60+36+12 = 233kg
So be sure that fisher and screws on the wall will be dimensioned to lift the total weight.