diff --git a/atm.lua b/atm.lua
index ee0308b..84f02f9 100644
--- a/atm.lua
+++ b/atm.lua
@@ -39,13 +39,76 @@ local function tryReadDiskCredentials(name)
     return nil
 end
 
-local function showLoginUI()
+local function tryLoginViaInput()
     drawFrame()
-    g.drawTextCenter(term, W/2, 3, "Welcome to HandieBank ATM!", colors.green, colors.white)
-    g.drawTextCenter(term, W/2, 5, "Insert your card below, or click to login.", colors.black, colors.white)
-    g.fillRect(term, 22, 7, 9, 3, colors.green)
-    g.drawTextCenter(term, W/2, 8, "Login", colors.white, colors.green)
+    g.drawTextCenter(term, W/2, 3, "Enter your username and password below.", colors.black, colors.white)
+    g.drawText(term, 22, 5, "Username", colors.black, colors.white)
+    g.drawXLine(term, 22, 40, 6, colors.lightGray)
+    g.drawText(term, 22, 8, "Password", colors.black, colors.white)
+    g.drawXLine(term, 22, 40, 9, colors.lightGray)
+
+    g.fillRect(term, 22, 11, 9, 3, colors.green)
+    g.drawTextCenter(term, W/2, 12, "Login", colors.white, colors.green)
+
+    g.fillRect(term, 22, 15, 9, 3, colors.red)
+    g.drawTextCenter(term, W/2, 16, "Cancel", colors.white, colors.red)
+
+    local username = ""
+    local password = ""
+    local selectedInput = "username"
     while true do
+        local usernameColor = colors.lightGray
+        if selectedInput == "username" then usernameColor = colors.gray end
+        g.drawXLine(term, 22, 40, 6, usernameColor)
+        g.drawText(term, 22, 6, string.rep("*", #username), colors.white, usernameColor)
+
+        local passwordColor = colors.lightGray
+        if selectedInput == "password" then passwordColor = colors.gray end
+        g.drawXLine(term, 22, 40, 9, passwordColor)
+        g.drawText(term, 22, 9, string.rep("*", #password), colors.white, passwordColor)
+
+        local event, p1, p2, p3 = os.pullEvent()
+        if event == "char" then
+            local char = p1
+            if selectedInput == "username" and #username < 12 then
+                username = username .. char
+            elseif selectedInput == "password" and #password < 18 then
+                password = password .. char
+            end
+        elseif event == "key" then
+            local keyCode = p1
+            local held = p2
+            if keyCode == keys.backspace then
+                if selectedInput == "username" and #username > 0 then
+                    username = string.sub(username, 1, #username - 1)
+                elseif selectedInput == "password" and #password > 0 then
+                    password = string.sub(password, 1, #password - 1)
+                end
+            end
+        elseif event == "mouse_click" then
+            local button = p1
+            local x = p2
+            local y = p3
+            if y == 6 and x >= 22 and x <= 40 then
+                selectedInput = "username"
+            elseif y == 9 and x >= 22 and x <= 40 then
+                selectedInput = "password"
+            elseif y >= 11 and y <= 13 and x >= 22 and x <= 30 then
+                return {username = username, password = password}
+            elseif y >= 15 and y <= 17 and x >= 22 and x <= 30 then
+                return nil
+            end
+        end
+    end
+end
+
+local function showLoginUI()
+    while true do
+        drawFrame()
+        g.drawTextCenter(term, W/2, 3, "Welcome to HandieBank ATM!", colors.green, colors.white)
+        g.drawTextCenter(term, W/2, 5, "Insert your card below, or click to login.", colors.black, colors.white)
+        g.fillRect(term, 22, 7, 9, 3, colors.green)
+        g.drawTextCenter(term, W/2, 8, "Login", colors.white, colors.green)
         local event, p1, p2, p3 = os.pullEvent()
         if event == "disk" then
             local credentials = tryReadDiskCredentials(p1)
@@ -59,8 +122,8 @@ local function showLoginUI()
             local x = p2
             local y = p3
             if button == 1 and x >= 22 and x <= 30 and y >= 7 and y <= 9 then
-                -- TODO: Show login input elements.
-                return {username = "bleh", password = "bleh"}
+                local credentials = tryLoginViaInput()
+                if credentials then return credentials end
             end
         end
     end