diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..165ecd1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+/grammars
+/target
+extension.wasm
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..572029f
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Hans
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/extension.toml b/extension.toml
new file mode 100644
index 0000000..81c79da
--- /dev/null
+++ b/extension.toml
@@ -0,0 +1,7 @@
+id = "rainbow-indent"
+name = "Rainbow Indent"
+version = "0.0.1"
+schema_version = 1
+authors = ["Adrian <adriangl@pvv.ntnu.no>"]
+description = "Highlight indents with different rainbow colors and make them red when they differ from tab size for all files"
+repository = "https://git.pvv.ntnu.no/adriangl/rainbow-indent"
diff --git a/src/indent_highlighter.rs b/src/indent_highlighter.rs
new file mode 100644
index 0000000..8a75a17
--- /dev/null
+++ b/src/indent_highlighter.rs
@@ -0,0 +1,68 @@
+use zed::prelude::*;
+use zed::syntax::SyntaxNode;
+use zed::highlight::{Highlighter, HighlightEvent, HighlightKind};
+use zed::settings::Settings;
+
+pub struct IndentHighlighter {
+    tab_size: usize,
+}
+
+impl IndentHighlighter {
+    pub fn new(settings: &Settings) -> Self {
+        let tab_size = settings.get("tab_size").unwrap_or(4);
+        Self { tab_size }
+    }
+
+    fn highlight_indent(&self, text: &str) -> Vec<HighlightEvent> {
+        let mut events = Vec::new();
+        let mut indent_level = 0;
+        let mut is_mismatched = false;
+
+        for (i, c) in text.chars().enumerate() {
+            match c {
+                '\t' => {
+                    indent_level += 1;
+                    is_mismatched = indent_level % self.tab_size != 0;
+                }
+                ' ' => {
+                    indent_level += 1;
+                    is_mismatched = indent_level % self.tab_size != 0;
+                }
+                _ => break,
+            }
+
+            let kind = if is_mismatched {
+                HighlightKind::Error
+            } else {
+                match indent_level % 7 {
+                    0 => HighlightKind::Keyword,
+                    1 => HighlightKind::Function,
+                    2 => HighlightKind::Number,
+                    3 => HighlightKind::Comment,
+                    4 => HighlightKind::Type,
+                    5 => HighlightKind::Operator,
+                    _ => HighlightKind::String,
+                }
+            };
+
+            events.push(HighlightEvent::Highlight {
+                range: i..i + 1,
+                kind,
+            });
+        }
+
+        events
+    }
+}
+
+impl Highlighter for IndentHighlighter {
+    fn highlight(&self, node: &SyntaxNode) -> Vec<HighlightEvent> {
+        let mut events = Vec::new();
+
+        for line in node.text().lines() {
+            events.extend(self.highlight_indent(line));
+        }
+
+        events
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..273f8e3
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,12 @@
+mod indent_highlighter;
+
+use zed::prelude::*;
+use zed::highlight::Highlighter;
+
+fn main() {
+    let tab_width = 4; // You can change this value as needed
+    let highlighter = indent_highlighter::IndentHighlighter::new(tab_width);
+
+    // Initialize the highlighter (this is a placeholder, actual initialization may vary)
+    zed::highlight::set_highlighter(Box::new(highlighter));
+}