diff --git a/mers/src/lang/fmtgs.rs b/mers/src/lang/fmtgs.rs
new file mode 100644
index 0000000..28eea1a
--- /dev/null
+++ b/mers/src/lang/fmtgs.rs
@@ -0,0 +1,180 @@
+use std::fmt::{Display, Formatter};
+
+use super::global_info::{ColorFormatMode, ColorFormatter, GlobalScriptInfo};
+
+use colorize::AnsiColor;
+
+pub enum Color {
+    Keep,
+    Grey,
+    Red,
+    Yellow,
+    Green,
+    Blue,
+    Cyan,
+    Magenta,
+}
+impl Color {
+    pub fn colorize(&self, s: String) -> String {
+        match self {
+            Self::Keep => s,
+            Self::Grey => s.grey().to_string(),
+            Self::Red => s.red().to_string(),
+            Self::Yellow => s.yellow().to_string(),
+            Self::Green => s.green().to_string(),
+            Self::Blue => s.blue().to_string(),
+            Self::Cyan => s.cyan().to_string(),
+            Self::Magenta => s.magenta().to_string(),
+        }
+    }
+}
+
+#[derive(Default)]
+pub struct FormatInfo {
+    pub depth: usize,
+    pub brackets: usize,
+}
+impl FormatInfo {
+    fn color<F>(&self, info: Option<&GlobalScriptInfo>, color: F, s: String) -> String
+    where
+        F: Fn(&ColorFormatter) -> &Color,
+    {
+        if let Some(info) = info {
+            let color = color(&info.formatter);
+            match info.formatter.mode {
+                ColorFormatMode::Plain => s,
+                ColorFormatMode::Colorize => color.colorize(s),
+            }
+        } else {
+            s
+        }
+    }
+    pub fn open_bracket(&mut self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        let o = self.color(
+            info,
+            |c| &c.bracket_colors[self.brackets % c.bracket_colors.len()],
+            s,
+        );
+        self.brackets += 1;
+        o
+    }
+    pub fn close_bracket(&mut self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.brackets -= 1;
+        self.color(
+            info,
+            |c| &c.bracket_colors[self.brackets % c.bracket_colors.len()],
+            s,
+        )
+    }
+    pub fn go_deeper(&mut self) {
+        self.depth += 1;
+    }
+    pub fn go_shallower(&mut self) {
+        self.depth -= 1;
+    }
+    pub fn variable_ref_symbol(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        s
+    }
+    pub fn variable(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.color(info, |c| &c.variable_color, s)
+    }
+    pub fn if_if(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.color(info, |c| &c.keyword_if_color, s)
+    }
+    pub fn if_else(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.color(info, |c| &c.keyword_else_color, s)
+    }
+    pub fn loop_loop(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.color(info, |c| &c.keyword_loop_color, s)
+    }
+    pub fn loop_for(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.color(info, |c| &c.keyword_for_color, s)
+    }
+    pub fn kw_switch(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.color(info, |c| &c.keyword_switch_color, s)
+    }
+    pub fn kw_match(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.color(info, |c| &c.keyword_match_color, s)
+    }
+    pub fn fncall(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.color(info, |c| &c.function_call_color, s)
+    }
+    pub fn fndef_fn(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.color(info, |c| &c.function_def_fn_color, s)
+    }
+    pub fn fndef_name(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.color(info, |c| &c.function_def_name_color, s)
+    }
+    pub fn value_string_quotes(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.color(info, |c| &c.value_string_quotes_color, s)
+    }
+    pub fn value_string_content(&self, info: Option<&GlobalScriptInfo>, s: String) -> String {
+        self.color(info, |c| &c.value_string_content_color, s)
+    }
+    pub fn line_prefix(&self) -> String {
+        "    ".repeat(self.depth)
+    }
+}
+
+pub trait FormatGs {
+    fn fmtgs(
+        &self,
+        f: &mut Formatter,
+        info: Option<&GlobalScriptInfo>,
+        form: &mut FormatInfo,
+        file: Option<&crate::parsing::file::File>,
+    ) -> std::fmt::Result;
+    fn with_info<'a>(&'a self, info: &'a GlobalScriptInfo) -> FormatWithGs<'a, Self> {
+        FormatWithGs {
+            format: &self,
+            info: Some(info),
+            file: None,
+        }
+    }
+    fn with_file<'a>(&'a self, file: &'a crate::parsing::file::File) -> FormatWithGs<'a, Self> {
+        FormatWithGs {
+            format: &self,
+            info: None,
+            file: Some(file),
+        }
+    }
+    fn with_info_and_file<'a>(
+        &'a self,
+        info: &'a GlobalScriptInfo,
+        file: &'a crate::parsing::file::File,
+    ) -> FormatWithGs<'a, Self> {
+        FormatWithGs {
+            format: &self,
+            info: Some(info),
+            file: Some(file),
+        }
+    }
+    fn with<'a>(
+        &'a self,
+        info: Option<&'a GlobalScriptInfo>,
+        file: Option<&'a crate::parsing::file::File>,
+    ) -> FormatWithGs<'a, Self> {
+        FormatWithGs {
+            format: &self,
+            info,
+            file,
+        }
+    }
+}
+pub struct FormatWithGs<'a, T: ?Sized>
+where
+    T: FormatGs,
+{
+    format: &'a T,
+    info: Option<&'a GlobalScriptInfo>,
+    file: Option<&'a crate::parsing::file::File>,
+}
+impl<'a, T> Display for FormatWithGs<'a, T>
+where
+    T: FormatGs,
+{
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        self.format
+            .fmtgs(f, self.info, &mut FormatInfo::default(), self.file.clone())
+    }
+}