diff --git a/src/main/java/com/atsuishio/superbwarfare/client/RenderHelper.java b/src/main/java/com/atsuishio/superbwarfare/client/RenderHelper.java
index 09eaaec00..4793f075a 100644
--- a/src/main/java/com/atsuishio/superbwarfare/client/RenderHelper.java
+++ b/src/main/java/com/atsuishio/superbwarfare/client/RenderHelper.java
@@ -5,6 +5,7 @@ import com.mojang.blaze3d.vertex.*;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.renderer.GameRenderer;
+import net.minecraft.client.renderer.RenderType;
 import net.minecraft.client.renderer.culling.Frustum;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.phys.Vec3;
@@ -255,11 +256,45 @@ public class RenderHelper {
         Vector3f transformedPos = frustum.matrix.transformProject(relativePos.x, relativePos.y, relativePos.z, new Vector3f());
 
         double scaleFactor = minecraft.getWindow().getGuiScale();
-        float guiScaleMul = 0.5f / (float) scaleFactor;
+        float guiScaleMul = (float) (0.5f / scaleFactor);
 
         Vector3f screenPos = transformedPos.mul(1.0f, -1.0f, 1.0f).add(1.0f, 1.0f, 0.0f)
                 .mul(guiScaleMul * minecraft.getWindow().getWidth(), guiScaleMul * minecraft.getWindow().getHeight(), 1.0f);
 
         return transformedPos.z < 1.0f ? new Vec3(screenPos.x, screenPos.y, transformedPos.z) : null;
     }
+
+    /**
+     * Fills a rectangle with the specified color and z-level using the given render type and coordinates as the boundaries.
+     *
+     * @param renderType the render type to use.
+     * @param minX       the minimum x-coordinate of the rectangle.
+     * @param minY       the minimum y-coordinate of the rectangle.
+     * @param maxX       the maximum x-coordinate of the rectangle.
+     * @param maxY       the maximum y-coordinate of the rectangle.
+     * @param z          the z-level of the rectangle.
+     * @param color      the color to fill the rectangle with.
+     */
+    public static void fill(GuiGraphics guiGraphics, RenderType renderType, float minX, float minY, float maxX, float maxY, float z, int color) {
+        Matrix4f matrix4f = guiGraphics.pose().last().pose();
+        if (minX < maxX) {
+            float i = minX;
+            minX = maxX;
+            maxX = i;
+        }
+
+        if (minY < maxY) {
+            float j = minY;
+            minY = maxY;
+            maxY = j;
+        }
+
+        VertexConsumer vertexconsumer = guiGraphics.bufferSource().getBuffer(renderType);
+        vertexconsumer.addVertex(matrix4f, minX, minY, z).setColor(color);
+        vertexconsumer.addVertex(matrix4f, minX, maxY, z).setColor(color);
+        vertexconsumer.addVertex(matrix4f, maxX, maxY, z).setColor(color);
+        vertexconsumer.addVertex(matrix4f, maxX, minY, z).setColor(color);
+
+        guiGraphics.flush();
+    }
 }
diff --git a/src/main/java/com/atsuishio/superbwarfare/client/overlay/StaminaOverlay.java b/src/main/java/com/atsuishio/superbwarfare/client/overlay/StaminaOverlay.java
index 1dc9e4414..6d2e6fc39 100644
--- a/src/main/java/com/atsuishio/superbwarfare/client/overlay/StaminaOverlay.java
+++ b/src/main/java/com/atsuishio/superbwarfare/client/overlay/StaminaOverlay.java
@@ -1,6 +1,7 @@
 package com.atsuishio.superbwarfare.client.overlay;
 
 import com.atsuishio.superbwarfare.Mod;
+import com.atsuishio.superbwarfare.client.RenderHelper;
 import com.atsuishio.superbwarfare.config.client.DisplayConfig;
 import com.atsuishio.superbwarfare.entity.vehicle.base.ArmedVehicleEntity;
 import com.atsuishio.superbwarfare.event.ClientEventHandler;
@@ -46,10 +47,15 @@ public class StaminaOverlay implements LayeredDraw.Layer {
         RenderSystem.enableBlend();
         RenderSystem.setShader(GameRenderer::getPositionTexShader);
         RenderSystem.blendFuncSeparate(GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA, GlStateManager.SourceFactor.ONE, GlStateManager.DestFactor.ZERO);
-        RenderSystem.setShaderColor(1, 1, 1, (float) Mth.clamp(ClientEventHandler.switchTime, 0, 1));
 
-        guiGraphics.fill(RenderType.guiOverlay(), w / 2 - 64, h - 48, w / 2 + 64, h - 49, -90, -16777216);
-        guiGraphics.fill(RenderType.guiOverlay(), w / 2 - 64, h - 48, w / 2 + 64 - (int) (1.28 * ClientEventHandler.stamina), h - 49, -90, -1);
+        if (ClientEventHandler.exhaustion) {
+            RenderSystem.setShaderColor(1, 0, 0, (float) Mth.clamp(ClientEventHandler.switchTime, 0, 1));
+        } else {
+            RenderSystem.setShaderColor(1, 1, 1, (float) Mth.clamp(ClientEventHandler.switchTime, 0, 1));
+        }
+
+        RenderHelper.fill(guiGraphics, RenderType.guiOverlay(), (float) w / 2 - 64, h - 48, (float) w / 2 + 64, h - 49, -90, -16777216);
+        RenderHelper.fill(guiGraphics, RenderType.guiOverlay(), (float) w / 2 - 64, (float) (h - 48), (float) (w / 2 + 64 - (1.28 * ClientEventHandler.stamina)), h - 49, -90, -1);
 
         guiGraphics.pose().popPose();
     }