Congratulations, Tommy.
There is a new level every 250 posts, from 1,000 to 9,750. After that, only every thousand posts (until they become scarce after the 70,000's).
1,000--First Level Red Feather
1,250--Second Level Red Feather
1,500--Third Level Red Feather
1,750--Fourth Level Red Feather
2,000--First Level Orange Feather
2,250--Second Level Orange Feather
2,500--Third Level Orange Feather
2,750--Fourth Level Orange Feather
3,000--First Level Yellow Feather
3,250--Second Level Yellow Feather
3,500--Third Level Yellow Feather
3,750--Fourth Level Yellow Feather
4,000--First Level Green Feather
4,250--Second Level Green Feather
4,500--Third Level Green Feather
4,750--Fourth Level Green Feather
5,000--First Level Blue Feather
5,250--Second Level Blue Feather
5,500--Third Level Blue Feather
5,750--Fourth Level Blue Feather
6,000--First Level Indigo Feather
6,250--Second Level Indigo Feather
6,500--Third Level Indigo Feather
6,750--Fourth Level Indigo Feather
7,000--First Level Violet Feather
7,250--Second Level Violet Feather
7,500--Third Level Violet Feather
7,750--Fourth Level Violet Feather
8,000--First Level Black Feather
8,250--Second Level Black Feather
8,500--Third Level Black Feather
8,750--Fourth Level Black Feather
9,000--First Level White Feather
9,250--Second Level White Feather
9,500--Third Level White Feather
9,750--Fourth Level White Feather