diff --git a/src/builder.nim b/src/builder.nim
new file mode 100644
index 0000000..876d270
--- /dev/null
+++ b/src/builder.nim
@@ -0,0 +1,43 @@
+import cursor, parser, types
+
+type Builder* = ref object of RootObj
+    parser*: Parser
+    cursor: Cursor
+    tags: seq[Tag]
+
+method find_closer(this: Builder, tag: Token): bool {.base.} =
+    var initial_index = this.cursor.get_index()
+    var name = tag.name
+    var closer_expected = 1
+    for token in this.cursor.iter():
+        if token.kind == TokenType.TagCloser and token.name == name:
+            dec closer_expected
+        elif token.kind == TokenType.TagOpener and token.name == name:
+            inc closer_expected
+        if closer_expected == 0:
+            this.cursor.go_to(initial_index)
+            return true
+    this.cursor.go_to(initial_index)
+    return false
+
+method build*(this: Builder) {.base.} =
+    this.cursor = Cursor(data: this.parser.tokens)
+    var opened_tags: seq[Tag]
+    var closer_tag = false
+    var tag: Tag
+    for token in this.cursor.iter():
+        if token.kind == TokenType.TagOpener:
+            closer_tag = this.find_closer(token)
+            tag = Tag(name: token.name, args: token.args, level: len(opened_tags), no_closer: not closer_tag, index: len(this.tags))
+            if closer_tag:
+                opened_tags.add(tag)
+            this.tags.add(tag)
+        elif token.kind == TokenType.TagCloser:
+            if opened_tags[len(opened_tags)-1].name == token.name:
+                opened_tags.delete(len(opened_tags)-1)
+        elif token.kind == TokenType.Text:
+            if len(opened_tags) > 0:
+                opened_tags[len(opened_tags)-1].texts.add(token.content)
+
+method get_tags*(this: Builder): seq[Tag] {.base.} =
+    return this.tags