1. Buy gas and fill it into a canister, preferably at a gas station in a different city or far away from your home adress. 4.5 litres should be more than sufficient.
2. Get 2-3 large water bottles. Remove the wrapping with the bar codes.
3. Clean the water bottles under runnig water while wearing a double layer of rubber gloves.
Do not handle the water bottles without a double layer of rubber gloves from this point on.
4. Fill the gas into the water bottles.
5. Scout out the building on the fortnite map which you chose as your target. You might have to scout out multiple buildings while remaining inconspicious, so this might take a day or two.
6. Put on freshly washed dark clothes, ideally shave your head or wear a cap. This way any DNA traces will be less likely to be found, if the pigs decide to search for them. You can buy a cheap windbreaker for one time use so noone can identify you from your clothes later on. Antifa often does that.
7. Pack your backpackwhile wearing gloves. You will only need a few things. A mask or something else to cover your face, a lighter, the water bottles filled with gas and some food as a cover.
8. At around 3am at night, walk to the fortnite building.
Leave your phone, aka your spook tracking device / bug, at home.
9. When arrived in its vicinity, check to see if there are people around. If clear, put on the mask.
10. Enter the building (the details of that can be found elsewhere, wether you use glass cutter and sucker cup, a crowbar, a picklock or just the good old glassbreaker is up to you) or approach the previously identified weak spot on the outside.
11. Pour the gas over a flammable area.
12. Light it. You can leave the water bottles there.
13. Get the fuck out of there.
Avoid main streets. Wait out bypassing cars in the shadows.
14. Wipe the lighter with a cloth after you have travelled some distance and throw it away, and take off your mask.