Clearing up ambiguity of brick blocks

Author: Zarinie

python/lesson2/activity3.md

@@ -8,12 +8,12 @@ blocks.block_with_data(GRASS_BLOCK, 0)
 ```
 
 ## Step 1
-Write some code to construct a whole staircase, out of **bricks**. You will need to change the **second** and **third** coordinate of the **second** parameter in all of the three `||blocks: place block at position||` commands. You will also need to update the data values in the `||blocks: block with data||` commands. Remember, each data value equals direction with stairs.
+Write some code to construct a whole staircase, out of **brick blocks** (brick_block). You will need to change the **second** and **third** coordinate of the **second** parameter in all of the three `||blocks: place block at position||` commands. You will also need to update the data values in the `||blocks: block with data||` commands. Remember, each data value equals direction with stairs.
 
 ### ~ tutorialhint 
 Look at the walls to see the east, west, north and south directions.
 For data values: 
 0 = W  
 1 = E   
 2 = N  
-3 = S
+3 = S