diff --git a/parts/modes/c4wtrain_l.lua b/parts/modes/c4wtrain_l.lua
index 7126300d..7c24df47 100644
--- a/parts/modes/c4wtrain_l.lua
+++ b/parts/modes/c4wtrain_l.lua
@@ -1,4 +1,3 @@
-local rnd=math.random
 local rem=table.remove
 local function check_c4w(P)
 	if P.lastPiece.row==0 then
@@ -38,18 +37,18 @@ return{
 			P.visTime[i]=FREEROW.get(20)
 			for x=4,7 do F[i][x]=0 end
 		end
-		if rnd()<.6 then
+		if P:RND()<.6 then
 			local initCell={11,14,12,13,21,24}
 			for _=1,3 do
-				_=rem(initCell,rnd(#initCell))
+				_=rem(initCell,P:RND(#initCell))
 				F[math.floor(_/10)][3+_%10]=20
 			end
 		else
 			local initCell={11,12,13,14,21,22,23,24}
-			rem(initCell,rnd(5,8))
-			rem(initCell,rnd(1,4))
+			rem(initCell,P:RND(5,8))
+			rem(initCell,P:RND(1,4))
 			for _=1,6 do
-				_=rem(initCell,rnd(#initCell))
+				_=rem(initCell,P:RND(#initCell))
 				F[math.floor(_/10)][3+_%10]=20
 			end
 		end
diff --git a/parts/modes/c4wtrain_n.lua b/parts/modes/c4wtrain_n.lua
index a7f336a9..0432d660 100644
--- a/parts/modes/c4wtrain_n.lua
+++ b/parts/modes/c4wtrain_n.lua
@@ -1,4 +1,3 @@
-local rnd=math.random
 local rem=table.remove
 local function check_c4w(P)
 	if P.lastPiece.row>0 then
@@ -36,18 +35,18 @@ return{
 			P.visTime[i]=FREEROW.get(20)
 			for x=4,7 do F[i][x]=0 end
 		end
-		if rnd()<.6 then
+		if P:RND()<.6 then
 			local initCell={11,14,12,13,21,24}
 			for _=1,3 do
-				_=rem(initCell,rnd(#initCell))
+				_=rem(initCell,P:RND(#initCell))
 				F[math.floor(_/10)][3+_%10]=20
 			end
 		else
 			local initCell={11,12,13,14,21,22,23,24}
-			rem(initCell,rnd(5,8))
-			rem(initCell,rnd(1,4))
+			rem(initCell,P:RND(5,8))
+			rem(initCell,P:RND(1,4))
 			for _=1,6 do
-				_=rem(initCell,rnd(#initCell))
+				_=rem(initCell,P:RND(#initCell))
 				F[math.floor(_/10)][3+_%10]=20
 			end
 		end