diff --git a/readme.md b/readme.md
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@@ -1 +1,18 @@
 # Brochure Chalec
+
+Speechbubble.svg by Yannick Lung
+Licensed under CC BY 3.0 : https://creativecommons.org/licenses/by/3.0/
+Source : https://commons.wikimedia.org/w/index.php?curid=31753111
+
+
+Digital Tree.svg by Nevit Dilmen
+Licensed under CC BY-SA 3.0 : https://creativecommons.org/licenses/by-sa/3.0
+Source : https://commons.wikimedia.org/w/index.php?curid=35505400
+Modified materials :
+- Tree's color changed in orange to pale pink
+- Background color in yellow to pale blue
+- White plain circles with chalec services' logos added
+- eight rings removed from branches
+- third branch from third trunk (from left to right) was moved on fourth branch and rotated horizontally
+- fifth branch stretched towards top-right, ramified branches was cloned four times and moved on the sixth branch, first branch, second branch and fourth branch
+- Blue and yellow speechtalks were added