diff --git a/0004-on.update b/0004-on.update
index 386d3b7..4a7f7b3 100644
--- a/0004-on.update
+++ b/0004-on.update
@@ -1,5 +1,8 @@
 on.update = function(dt)
 	refresh_debug_animations()
+	if Active_button and Active_button.expire <= Current_time then
+		Active_button = nil
+	end
 	if App.mouse_down(1) then
 		update_any_sliders(App.mouse_x(), App.mouse_y())
 	end
@@ -9,4 +12,4 @@ on.update = function(dt)
 		adjust_scrollbar(Current_pane.output_editor_state, App.mouse_y())
 	end
 	if car.update then call_protected(car.update, dt) end
-end
\ No newline at end of file
+end
diff --git a/0016-on.mouse_press b/0016-on.mouse_press
index bd3d1b7..d267a80 100644
--- a/0016-on.mouse_press
+++ b/0016-on.mouse_press
@@ -1,4 +1,6 @@
 on.mouse_press = function(x,y, mouse_button)
+	-- some hysteresis right after a button has been pressed
+	if Active_button then return end
 	if mouse_press_consumed_by_any_button_handler(Global_state, x,y, mouse_button) then
 		return
 	end
diff --git a/0124-styled_button b/0124-styled_button
index 7b6d59e..51dd9c1 100644
--- a/0124-styled_button
+++ b/0124-styled_button
@@ -2,10 +2,20 @@ styled_button = function(name, x, y, onpress1)
 	local w = App.width(name)+10
 	button(Global_state, name, {x=x, y=y, w=w, h=Line_height, bg={r=0.6, g=0.8, b=0.6},
 		icon = function(p)
-			App.color(Normal_color)
+			if Active_button and Active_button.name == name and Active_button.expire > Current_time then
+				App.color(Highlighted_button_color)
+			else
+				App.color(Normal_color)
+			end
 			love.graphics.rectangle('line', p.x,p.y, p.w,p.h, 2,2)
 			love.graphics.print(name, p.x+5,p.y+2)
 		end,
-		onpress1 = onpress1,
+		onpress1 = function()
+			onpress1()
+			Active_button = {
+				name=name,
+				expire=Current_time+0.1,
+			}
+		end,
 	})
-end
\ No newline at end of file
+end
diff --git a/0147-Highlighted_button_color b/0147-Highlighted_button_color
new file mode 100644
index 0000000..fa735ff
--- /dev/null
+++ b/0147-Highlighted_button_color
@@ -0,0 +1 @@
+Highlighted_button_color = {r=1, g=1, b=1}
\ No newline at end of file
diff --git a/0148-Active_button b/0148-Active_button
new file mode 100644
index 0000000..9d53eef
--- /dev/null
+++ b/0148-Active_button
@@ -0,0 +1,3 @@
+Active_button = nil
+-- When a button is pressed:
+--   {name=..., expire=...}
\ No newline at end of file