What equipment to use to make liquid oxygen?
Simply put an open flask in the LN2 and it will fill with liquid oxygen from the air. 

Or better: DON'T DO THAT!! What the heck do you want with it?!?

LO2 is highly dangerous. If it comes in contact with anything combustible, it will blow up vigorously. Together with lab solvents, it will likely explode. Make sure the flask or dewar is dead clean. 
Chemistry is science, and science is about prediction. If you cannot predict, from knowledge, not hearsay, what your experiment will likely do, don't do it.