+ * vertical lines
+ * O 1 2 3 4 5
+ * 2100 +-----|-----|-----|-----|-----|-----|-----+
+ * | o o o |
+ * | o o o o | diag
+ * | o o o | lines
+ * 0/ o o o o \0
+ * y | o o |
+ * 1/ o o \1
+ * | |
+ * 2/------ ------\2
+ * | | | |
+ * | | | |
+ * 0 +-----+-----------------------------+-----+
+ * 0 x 3000