cd /System/Library/CoreServices/
cd Dock.app/
cd Contents/
cd Resources/
sudo mv indicator_large.png ORIGINAL_indicator_large.png
sudo mv indicator_medium_simple.png ORIGINAL_indicator_medium_simple.png
sudo mv indicator_medium.png ORIGINAL_indicator_medium.png
sudo mv indicator_small_simple.png ORIGINAL_indicator_small_simple.png
sudo mv indicator_small.png ORIGINAL_indicator_small.png
sudo mv /Users/fluffy3/Desktop/indicator_small.png indicator_small.png
sudo mv /Users/fluffy3/Desktop/indicator_large.png indicator_large.png
sudo mv /Users/fluffy3/Desktop/indicator_medium.png indicator_medium.png
killall Dock
cp indicator_small.png indicator_small_simple.png
sudo cp indicator_small.png indicator_small_simple.png
sudo cp indicator_medium.png indicator_medium_simple.png
killall Dock
defaults write com.apple.dock no-glass -boolean YES
killall Dock
defaults write com.apple.dock no-glass -boolean NO