updated

programs/plinko.lua

@@ -298,7 +298,9 @@ local function physicsLoop()
     local MAX_TIME = 14.0
 
     -- Per-peg cooldown to prevent vibrating stuck against one peg.
-    local pegCooldown = {}
+    -- Also used to track glow: peg stays lit while cooldown > 0.
+    local pegCooldown = {}   -- index -> time remaining
+    local pegLit      = {}   -- index -> true while glowing
 
     -- Pre-build bucket divider X positions (walls between buckets).
     -- Each divider is a thin vertical wall from bucketTop downward.
@@ -326,10 +328,16 @@ local function physicsLoop()
             vx = vx * s; vy = vy * s
         end
 
-        -- Tick peg cooldowns
+        -- Tick peg cooldowns; restore normal colour when glow expires
         for k, v in pairs(pegCooldown) do
             pegCooldown[k] = v - DT
-            if pegCooldown[k] <= 0 then pegCooldown[k] = nil end
+            if pegCooldown[k] <= 0 then
+                pegCooldown[k] = nil
+                if pegLit[k] then
+                    drawPeg(pegs[k], COL_PEG)
+                    pegLit[k] = nil
+                end
+            end
         end
 
         -- ── Peg collisions (only while above bucket zone) ───────────
@@ -363,7 +371,8 @@ local function physicsLoop()
                             vy = vy - newVn * ny
                         end
 
-                        pegCooldown[i] = 0.08
+                        pegCooldown[i] = 0.18   -- glow duration (s)
+                        pegLit[i]      = true
                         drawPeg(p, COL_PEG_HIT)
                     end
                 end