explain process of glycolysis

firstly, glucose is converted into glucose phosphate and then into glucose biphoshate through phosphorylation. This process turns two molecules of ATP to ADP. This is then split into two molecules (3 carbons in each) of triose phosphate. Finally through the process of oxidation, the triose phosphate is converted to pyruvate. Turning four molecules of ADP to ATP (net gain of 2 ATP) and converting two molecules of NAD to NADH.