diff --git a/xc7/blinky.ys b/xc7/blinky.ys
index c4aded99..090b0ab5 100644
--- a/xc7/blinky.ys
+++ b/xc7/blinky.ys
@@ -1,3 +1,53 @@
 read_verilog blinky.v
-synth_xilinx -top blinky
+
+#synth_xilinx -top blinky
+
+#begin:
+    read_verilog -lib +/xilinx/cells_sim.v
+    read_verilog -lib +/xilinx/cells_xtra.v
+#    read_verilog -lib +/xilinx/brams_bb.v
+#    read_verilog -lib +/xilinx/drams_bb.v
+    hierarchy -check -top blinky
+
+#flatten:     (only if -flatten)
+    proc
+    flatten
+
+#coarse:
+    synth -run coarse
+
+#bram:
+#    memory_bram -rules +/xilinx/brams.txt
+#    techmap -map +/xilinx/brams_map.v
+#
+#dram:
+#    memory_bram -rules +/xilinx/drams.txt
+#    techmap -map +/xilinx/drams_map.v
+
+fine:
+    opt -fast -full
+    memory_map
+    dffsr2dff
+#    dff2dffe
+    opt -full
+    techmap -map +/techmap.v #-map +/xilinx/arith_map.v
+    opt -fast
+
+map_luts:
+    abc -luts 2:2,3,6:5 #,10,20 [-dff]
+    clean
+
+map_cells:
+    techmap -map +/xilinx/cells_map.v
+    dffinit -ff FDRE Q INIT -ff FDCE Q INIT -ff FDPE Q INIT
+    clean
+
+check:
+    hierarchy -check
+    stat
+    check -noinit
+
+#edif:     (only if -edif)
+#    write_edif <file-name>
+
 write_json blinky.json