diff --git a/examples/wavy.glsl b/examples/wavy.glsl
index 95a73c1..2c5a3a0 100644
--- a/examples/wavy.glsl
+++ b/examples/wavy.glsl
@@ -28,5 +28,5 @@ void mainImage(out vec4 fragColor, in vec2 fragCoord) {
     //hor_lines = sin(iTime * 3.0 +hor_lines * 2.0 + uv.y / 50.0);
 
     //fragColor = vec4(uv.x, uv.y, 1.0, 1.0);
-    fragColor = vec4(hor_lines * 0.7, inverse_distance, inverse_distance, 1.0);
+    fragColor = vec4(hor_lines * 0.7, inverse_distance * 0.55, inverse_distance * 0.75, 1.0);
 }
diff --git a/glonkers.c b/glonkers.c
index 632deea..9f7c0b0 100644
--- a/glonkers.c
+++ b/glonkers.c
@@ -11,6 +11,10 @@
 #include "wayland.h"
 #include <string.h>
 
+void print_help(FILE *channel, char *bin_path) {
+    fprintf(channel, "Usage: %s [OPTION]... [PATH]\n", bin_path);
+}
+
 int main(int argc, char *argv[]) {
     char *shader_path = NULL;
     int output_type = OUTPUT_WINDOW;
@@ -19,7 +23,11 @@ int main(int argc, char *argv[]) {
     int output_count;
     // syntax: --window for a normal window or --layer for a wallpaper
     for (int i = 1; i < argc; i++) {
-        if (strcmp("--window", argv[i]) == 0) {
+        if (strcmp("--help", argv[i]) == 0) {
+            print_help(stdout, argv[0]);
+            return 0;
+        }
+        else if (strcmp("--window", argv[i]) == 0) {
             output_type = OUTPUT_WINDOW;
             currently_reading_output = false;
         }
@@ -41,14 +49,15 @@ int main(int argc, char *argv[]) {
         else if (!currently_reading_output) {
             // path to fragment shader
             if (shader_path != NULL) {
-                fprintf(stderr, "tried supplying '%s' as a shader file while one has already been selected\n", argv[i]);
+                fprintf(stderr, "Tried supplying '%s' as a shader file while one has already been selected.\n", argv[i]);
                 return 1;
             }
             shader_path = argv[i];
         }
     }
     if (shader_path == NULL) {
-        printf("need to supply path to shader\n");
+        fprintf(stderr, "Need to supply path to shader!\n");
+        print_help(stderr, argv[0]);
         return 1;
     }