When you buy a call you want the price to go up because you get (the option) to buy stock at a cheaper price (or whatever price you chose, aka the "strike price"). You pay a premium for this.

When you buy a Put you want the price to go down because you get (the option) to sell the stock at a price (strike price) higher than it is currently at. You pay a premium for this.

When you sell a call you want the price to go down because you have to sell stock at the strike price if they exercise their option. That will mean you have to sell the stock for less than it is currently selling for. You get paid a premium to take on the risk to sell those stocks at low price.

When you sell a Put you want the price to go up because you have to buy a stock at the strike price is they choose to exercise their option to sell you the stock. You get paid a premium to take on the risk of buying the stock at a price that is too high.