diff --git a/plugin/todoer.lua b/plugin/todoer.lua
index a1795cb..acc6dbf 100644
--- a/plugin/todoer.lua
+++ b/plugin/todoer.lua
@@ -1 +1,141 @@
-print("hello borja")
+vim.keymap.set("n", "<leader>t", function() end, { desc = "+Todos" })
+
+-- function that checks if the current line starts with the string "- [ ]" or "- [x]" and toggles the x
+local function toggle_todo()
+	local line = vim.api.nvim_get_current_line()
+	if string.sub(line, 1, 5) == "- [ ]" then
+		line = string.sub(line, 6, -1)
+		line = "- [x]" .. line
+		vim.api.nvim_set_current_line(line)
+	elseif string.sub(line, 1, 5) == "- [x]" then
+		line = string.sub(line, 6, -1)
+		line = "- [ ]" .. line
+		vim.api.nvim_set_current_line(line)
+	elseif string.sub(line, 1, 5) == "# [ ]" then
+		line = string.sub(line, 6, -1)
+		line = "# [x]" .. line
+		vim.api.nvim_set_current_line(line)
+	elseif string.sub(line, 1, 5) == "# [x]" then
+		line = string.sub(line, 6, -1)
+		line = "# [ ]" .. line
+		vim.api.nvim_set_current_line(line)
+	end
+end
+vim.keymap.set("n", "<leader>tt", toggle_todo, { desc = "Toggle todo" })
+
+-- function that checks if the current line doesn't start with the string "- [ ] " and, if it doesn't, adds the string at the beginning of the line
+local function add_todo()
+	local line = vim.api.nvim_get_current_line()
+	if string.sub(line, 1, 5) ~= "- [ ] " then
+		line = "- [ ] " .. line
+		vim.api.nvim_set_current_line(line)
+		vim.api.nvim_feedkeys("A", "n", true)
+	end
+end
+vim.keymap.set("n", "<leader>ta", add_todo, { desc = "Add todo" })
+
+-- function that checks if the current line starts with the string "- [ ]" or "- [x]" and, if it does, removes that string from the line
+local function remove_todo()
+	local line = vim.api.nvim_get_current_line()
+	if string.sub(line, 1, 6) == "- [ ] " or string.sub(line, 1, 6) == "- [x] " then
+		line = string.sub(line, 7, -1)
+		vim.api.nvim_set_current_line(line)
+	end
+end
+vim.keymap.set("n", "<leader>td", remove_todo, { desc = "Remove todo" })
+
+-- add new todo line when previous is already a todo
+
+local function on_enter()
+	local current_line = vim.api.nvim_get_current_line()
+
+	-- Check if the current line matches the pattern
+	local pattern = "^%- %[[ x]%] .*$"
+	local match = string.match(current_line, pattern)
+
+	if match then
+		if string.len(current_line) >= 7 then
+			vim.api.nvim_feedkeys("\n- [ ] ", "n", true)
+		else
+			-- go to normal mode before removing the content of the line
+			vim.api.nvim_feedkeys(vim.api.nvim_eval('"\\<esc>"'), "n", true)
+			vim.api.nvim_feedkeys("_", "n", true)
+			vim.api.nvim_feedkeys("C", "n", true)
+			vim.api.nvim_feedkeys("\n", "n", true)
+			-- vim.api.nvim_set_current_line("")
+		end
+	else
+		vim.api.nvim_feedkeys("\n", "n", true)
+	end
+end
+vim.keymap.set("i", "<CR>", on_enter, { desc = "On enter", noremap = true, expr = true })
+
+-- function that checks if the current line starts with the string "- [ ]" or "- [x]" and toggles the x
+local function toggle_todo()
+	local line = vim.api.nvim_get_current_line()
+	if string.sub(line, 1, 5) == "- [ ]" then
+		line = string.sub(line, 6, -1)
+		line = "- [x]" .. line
+		vim.api.nvim_set_current_line(line)
+	elseif string.sub(line, 1, 5) == "- [x]" then
+		line = string.sub(line, 6, -1)
+		line = "- [ ]" .. line
+		vim.api.nvim_set_current_line(line)
+	elseif string.sub(line, 1, 5) == "# [ ]" then
+		line = string.sub(line, 6, -1)
+		line = "# [x]" .. line
+		vim.api.nvim_set_current_line(line)
+	elseif string.sub(line, 1, 5) == "# [x]" then
+		line = string.sub(line, 6, -1)
+		line = "# [ ]" .. line
+		vim.api.nvim_set_current_line(line)
+	end
+end
+vim.keymap.set("n", "<leader>tt", toggle_todo, { desc = "Toggle todo" })
+
+-- function that checks if the current line doesn't start with the string "- [ ] " and, if it doesn't, adds the string at the beginning of the line
+local function add_todo()
+	local line = vim.api.nvim_get_current_line()
+	if string.sub(line, 1, 5) ~= "- [ ] " then
+		line = "- [ ] " .. line
+		vim.api.nvim_set_current_line(line)
+		vim.api.nvim_feedkeys("A", "n", true)
+	end
+end
+vim.keymap.set("n", "<leader>ta", add_todo, { desc = "Add todo" })
+
+-- function that checks if the current line starts with the string "- [ ]" or "- [x]" and, if it does, removes that string from the line
+local function remove_todo()
+	local line = vim.api.nvim_get_current_line()
+	if string.sub(line, 1, 6) == "- [ ] " or string.sub(line, 1, 6) == "- [x] " then
+		line = string.sub(line, 7, -1)
+		vim.api.nvim_set_current_line(line)
+	end
+end
+vim.keymap.set("n", "<leader>td", remove_todo, { desc = "Remove todo" })
+
+-- add new todo line when previous is already a todo
+
+local function on_enter()
+	local current_line = vim.api.nvim_get_current_line()
+
+	-- Check if the current line matches the pattern
+	local pattern = "^%- %[[ x]%] .*$"
+	local match = string.match(current_line, pattern)
+
+	if match then
+		if string.len(current_line) >= 7 then
+			vim.api.nvim_feedkeys("\n- [ ] ", "n", true)
+		else
+			-- go to normal mode before removing the content of the line
+			vim.api.nvim_feedkeys(vim.api.nvim_eval('"\\<esc>"'), "n", true)
+			vim.api.nvim_feedkeys("_", "n", true)
+			vim.api.nvim_feedkeys("C", "n", true)
+			vim.api.nvim_feedkeys("\n", "n", true)
+			-- vim.api.nvim_set_current_line("")
+		end
+	else
+		vim.api.nvim_feedkeys("\n", "n", true)
+	end
+end
+vim.keymap.set("i", "<CR>", on_enter, { desc = "On enter", noremap = true, expr = true })