Why is a red ball used in cricket test matches and a white one used in one day internationals?

So for halloween this year I’m planning to dress up as shaun from shaun of the dead. therefore i need a secondhand used cricket bat. I’m too lazy to make one, so I’m looking online. The ones on ebay are too costly however. Does anyone know where I could order on online for cheap?

I have PST and I know how to make seam edits. I currently have 3 sprint razor’s and the contract is about to expire. I want to take advantage of a new deal from cricket in my area, but stores in my area want to charge 50 to $60 per phone to flash them. I feel confident that I can do it on my own if I’m able to get ahold of the proper software. Any ideas?