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--- a/spice/Draft1.asc
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diff --git a/spice/lib/input-and-filters.asc b/spice/lib/input-and-filters.asc
new file mode 100644
index 0000000..a23bc9d
--- /dev/null
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diff --git a/spice/lib/input-and-filters.asy b/spice/lib/input-and-filters.asy
new file mode 100644
index 0000000..89264f0
--- /dev/null
+++ b/spice/lib/input-and-filters.asy
@@ -0,0 +1,26 @@
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diff --git a/spice/lib/summing.asc b/spice/lib/summing.asc
new file mode 100644
index 0000000..21bed21
--- /dev/null
+++ b/spice/lib/summing.asc
@@ -0,0 +1,76 @@
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diff --git a/spice/lib/summing.asy b/spice/lib/summing.asy
new file mode 100644
index 0000000..d45cd0a
--- /dev/null
+++ b/spice/lib/summing.asy
@@ -0,0 +1,24 @@
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