diff --git a/inferium-gui.lua b/inferium-gui.lua
index e505c41..b06d4b5 100644
--- a/inferium-gui.lua
+++ b/inferium-gui.lua
@@ -1 +1,15 @@
-print('TODO')
\ No newline at end of file
+local CountersSelector = require('libs/ui/CountersSelector')
+
+local config = {
+  counterMax = 8
+}
+
+local countersMap = {
+  iron = 1,
+  yolo = 2,
+  truc = 3
+}
+
+local result = CountersSelector(countersMap, config)
+term.clear()
+print(textutils.serialize(result))
diff --git a/install.lua b/install.lua
index 18c2ee8..d21a8ee 100644
--- a/install.lua
+++ b/install.lua
@@ -28,7 +28,8 @@ local LIST_LIBS_FILES = {
   'libs/net.lua',
   'libs/utils.lua',
   'libs/turtle-utils.lua',
-  'libs/robot.lua'
+  'libs/robot.lua',
+  'libs/ui/CountersSelector.lua'
 }
 
 local LIST_GLOBAL_CONFIG_FILES = {
@@ -73,6 +74,7 @@ end
 local prepareDirs = function()
   fs.makeDir('/old')
   fs.makeDir('/libs')
+  fs.makeDir('/libs/ui')
   fs.makeDir('/config')
   fs.makeDir('/data')
 end
diff --git a/libs/ui/CountersSelector.lua b/libs/ui/CountersSelector.lua
new file mode 100644
index 0000000..839ed56
--- /dev/null
+++ b/libs/ui/CountersSelector.lua
@@ -0,0 +1,157 @@
+local utils = require('libs/utils')
+
+local function noTitleFn()
+  return ""
+end
+
+local savedTextColor = nil
+local savedBackgroundColor = nil
+
+local function saveTermConfig()
+  savedTextColor = term.getTextColor()
+  savedBackgroundColor = term.getBackgroundColor()
+end
+
+local function restoreTermConfig()
+  term.setTextColor(savedTextColor)
+  term.setBackgroundColor(savedBackgroundColor)
+end
+
+local function getTotalCount(countersMap)
+  local total = 0
+  for _, counter in pairs(countersMap) do
+    total = total + (counter or 0)
+  end
+  return total
+end
+
+local function omitN(t, n)
+  local result = {}
+
+  for k,v in pairs(t) do
+    if n == 0 then
+      result[k] = v
+    end
+    n = n - 1
+  end
+
+  return result
+end
+
+local function pickN(t, n)
+  local result = {}
+
+  for k,v in pairs(t) do
+    if n == 0 then
+      break
+    end
+    result[k] = v
+    n = n - 1
+  end
+
+  return result
+end
+
+local TITLE_MARGIN = 1
+
+local function renderCountersMap(countersMap, selectedCounter, titleFn)
+  term.setCursorPos(1, 1)
+  local _, height = term.getSize()
+  -- local nbCounters = utils.sizeof(countersMap)
+  local selectedCounterKey = countersMap[selectedCounter]
+  -- local totalCount = getTotalCount(countersMap)
+
+  local topMargin = 0
+  local bottomMargin = 0
+
+  if titleFn ~= noTitleFn then
+    term.clearLine()
+    term.write('custom title: ' .. titleFn(countersMap, selectedCounter))
+    topMargin = TITLE_MARGIN
+  end
+
+  local availableHeight = height - topMargin - bottomMargin
+
+  local selectedPage = (selectedCounter % availableHeight) + 1
+  -- local totalPages = (nbCounters % availableHeight) + 1
+
+  local nbElementsToOmit = (selectedPage - 1) * availableHeight
+  local displayedCounters = pickN(omitN(countersMap, nbElementsToOmit), availableHeight)
+
+  local cursorYIndex = 1 + topMargin
+  for k,v in pairs(displayedCounters) do
+    term.clearLine()
+    term.setCursorPos(1, cursorYIndex)
+
+    if k == selectedCounterKey then
+      term.setBackgroundColor(colors.white)
+      term.setTextColor(colors.black)
+    else
+      term.setBackgroundColor(colors.black)
+      term.setTextColor(colors.white)
+    end
+
+    term.write(tostring(k) .. ' ' .. tostring(v))
+    cursorYIndex = cursorYIndex + 1
+  end
+end
+
+local function CountersSelector(initialCountersMap, config)
+  local countersMap = utils.shallowClone(initialCountersMap)
+  local counterMax = config.counterMax
+  local titleFn = config.titleFn or noTitleFn
+
+  if not counterMax then
+    error('no counterMax found in CountersSelector config')
+  end
+
+  if utils.sizeof(countersMap) == 0 then
+    error('empty countersMap provided')
+  end
+
+  saveTermConfig()
+  term.clear()
+
+  local selectedCounter = 1
+  local nbCounters = utils.sizeof(countersMap)
+  local globalCounter = getTotalCount(countersMap)
+
+  if globalCounter > counterMax then
+    error('counter cannot be greater than the counterMax')
+  end
+
+  local shouldContinue = true
+  while shouldContinue do
+    local _, keyPressed, isHeld = os.pullEvent('key')
+
+    if keyPressed == keys.up then
+      selectedCounter = math.max(1, selectedCounter - 1)
+    elseif keyPressed == keys.down then
+      selectedCounter = math.min(nbCounters, selectedCounter + 1)
+    elseif keyPressed == keys.left and globalCounter > 0 then
+      local currentCount = countersMap[selectedCounter]
+      if currentCount and currentCount > 0 then
+        countersMap[selectedCounter] = currentCount - 1
+        globalCounter = globalCounter - 1
+      end
+    elseif keyPressed == keys.right and globalCounter < counterMax then
+      local currentCount = countersMap[selectedCounter]
+      if currentCount then
+        countersMap[selectedCounter] = currentCount + 1
+        globalCounter = globalCounter + 1
+      end
+    elseif keyPressed == keys.enter then
+      shouldContinue = false
+    end
+
+    if shouldContinue then
+      renderCountersMap(countersMap, selectedCounter, titleFn)
+    end
+  end
+
+  restoreTermConfig()
+
+  return countersMap, selectedCounter
+end
+
+return CountersSelector
\ No newline at end of file