minor docs

Author: LdDl

README.md

@@ -22,9 +22,28 @@ go get github.com/LdDl/gocv-blob
 ```
 
 p.s. do not be worried when you see *can't load package: package github.com/LdDl/gocv-blob: no Go files....* - this is just warning.
+
 ## Usage
 
-@todo
+It's pretty straightforward (pseudocode'ish)
+```go
+// 1. Define global set of blobs
+global_blobs = blob.NewBlobiesDefaults()
+
+// 2. Define new blob objects
+new_blob1 = blob.NewBlobie(image.Rectangle, how many points to store in track, class ID of object , class name of object)
+new_blob2 = blob.NewBlobie(image.Rectangle, how many points to store in track, class ID of object , class name of object)
+
+// 3. Append data to temporary set of blobs
+tmp_blobs = []*blob.Blobie{}
+tmp_blobs = append(tmp_blobs, new_blob1)
+tmp_blobs = append(tmp_blobs, new_blob2)
+
+// 4. Compare blobs ()
+global_blobs.MatchToExisting(tmp_blobs)
+
+// 5. Repeat 2-4 every time when you find new objects on images. MatchToExisting() will update existing blobs and register new ones.
+```
 
 ## Support